This calculus video tutorial provides a basic introduction into the derivatives of trigonometric functions such as sin, cos, tan, sec, csc, and cot. It contains plenty of practice problems.

Derivatives - Fast Review: https://www.youtube.com/watch?v=5yfh5cf4-0w&t=1s

Limit Definition of the Derivative:
https://www.youtube.com/watch?v=-aTLjoDT1GQ

Derivatives - Alternate Limit Definition:
https://www.youtube.com/watch?v=6yzaEpacZkg

Derivatives - The Constant Rule:
https://www.youtube.com/watch?v=cyn6CDnAlcA

Derivatives - The Power Rule:
https://www.youtube.com/watch?v=9Yz-RCdS2Tg

_________________________________
Derivatives - Constant Multiple Rule:
https://www.youtube.com/watch?v=ut-AFj600S0

Derivatives - Polynomial Functions:
https://www.youtube.com/watch?v=8Sv6CNuNwqo

Derivatives - Sine and Cosine:
https://www.youtube.com/watch?v=QYJx-ztCrE4

Derivatives - Trigonometric Functions:
https://www.youtube.com/watch?v=PEqCa0U77mc

Derivatives - Limits:
https://www.youtube.com/watch?v=xGibYZiT5-U

_______________________________________
Equation of the Tangent Line:
https://www.youtube.com/watch?v=5NyeGzbBJQM

Derivatives - Horizontal Tangent Line:
https://www.youtube.com/watch?v=aNfoxbMUOHk

The Equation of The Normal Line:
https://www.youtube.com/watch?v=lEF2mmR3CWU

The Equation of The Secant Line:
https://www.youtube.com/watch?v=680o1GL-LRg

Average and Instantaneous Velocity:
https://www.youtube.com/watch?v=AwxT1xjMP9g

_______________________________________
Final Exams and Video Playlists:
https://www.video-tutor.net/

Full-Length Videos and Worksheets:
https://www.patreon.com/MathSc....ienceTutor/collectio

This statistics video tutorial explains when you should use a one tailed test vs a two tailed test when solving problems associated with hypothesis testing. It all depends on the statement associated with the alternative hypothesis. This video also discusses the critical values and significance level associated with hypothesis testing.

Confidence Intervals & Margin of Error:
https://www.youtube.com/watch?v=DT-fPG0Hff8

Find The Z-Score Given Confidence Interval:
https://www.youtube.com/watch?v=sJyZ9vRhP7o

Student's T-Distribution:
https://www.youtube.com/watch?v=MUD390jtgQs

Hypothesis Testing - Null & Alternative:
https://www.youtube.com/watch?v=wiYJWyfdGg4

Type I and Type II Errors:
https://www.youtube.com/watch?v=9yQm9F2_yIk

One Tailed and Two Tailed Tests:
https://www.youtube.com/watch?v=XHPIEp-3yC0

_______________________________________
Test Static For Means & Pop Proportions:
https://www.youtube.com/watch?v=Hag0GW9B6EY

Hypothesis Testing Problems:
https://www.youtube.com/watch?v=zJ8e_wAWUzE

P-Value Method - Hypothesis Testing:
https://www.youtube.com/watch?v=8Aw45HN5lnA

Hypothesis Testing - Proportions:
https://www.youtube.com/watch?v=76VruarGn2Q

Difference of 2 Means - H Testing:
https://www.youtube.com/watch?v=UcZwyzwWU7o

Cohen's D - Pooled Standard Deviation:
https://www.youtube.com/watch?v=GDe4M0xEghs

Hypothesis Testing - 2 Proportions:
https://www.youtube.com/watch?v=pCbNUnZ98oE

__________________________________
Matched or Paired Samples t-Test:
https://www.youtube.com/watch?v=JiQR0lHLe74

Chi Square Test:
https://www.youtube.com/watch?v=HKDqlYSLt68

Chi Square Distribution Test:
https://www.youtube.com/watch?v=O6a76Dnn104

Test of Independence - Chi Square Dist:
https://www.youtube.com/watch?v=y5nxiL6civU

Final Exams and Video Playlists:
https://www.video-tutor.net/

Full-Length Videos and Worksheets:
https://www.patreon.com/MathSc....ienceTutor/collectio

This Algebra video provides a basic introduction into graphing absolute value functions using transformations and data tables. It explains how to find the domain and range of absolute value functions.

Functions and Graphs Practice Test: https://www.youtube.com/watch?v=kvU9sOzT2mk

Transformations of Functions:
https://www.youtube.com/watch?v=Tmdrjs9xufc

____________________________________________
How To Find The Range of a Function:
https://www.youtube.com/watch?v=Si2vmzUWfJE

Domain and Range - More Examples:
https://www.youtube.com/watch?v=KyOQhC8ctxc

Domain and Range From a Graph:
https://www.youtube.com/watch?v=KirGQOwjBVI

____________________________________________
Domain and Range - Radical Functions:
https://www.youtube.com/watch?v=VM3iMj0BwLE

Domain of Logarithmic Functions:
https://www.youtube.com/watch?v=WfgYJy035k0

Domain and Range - Piecewise Functions:
https://www.youtube.com/watch?v=0ZoSxPg6JSQ

Domain and Range - Inverse Functions:
https://www.youtube.com/watch?v=wP4JjdFbCkY

_____________________________________________
SAT Math Test Prep:
https://www.youtube.com/watch?v=fTGuTEQCsZY

ACT Math Test Prep:
https://www.youtube.com/watch?v=SsA7rZ8kczM

Final Exams and Video Playlists:
https://www.video-tutor.net/

Full-Length Math & Science Videos:
https://www.patreon.com/mathsc....iencetutor/collectio

What do you and a sack of batteries have in common? Today, Hank explains.

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: https://apple.co/3d4eyZo
Download it here for Android Devices: https://bit.ly/2SrDulJ

Chapters:
Introduction: What do Neurons Do? 00:00
Your Body is a Sack of Batteries 1:18
How Electricity Works Inside Your Nervous System 3:18
Sodium-Potassium Pump 4:04
Types of Ion Channels: Voltage-Gated, Ligand-Gated, and Mechanically-Gated 4:51
Graded Potential vs. Action Potential 5:45
Depolarization 6:19
Repolarization 7:35
Hyperpolarization 8:00
Refractory Period 8:14
Review 10:06
Credits 10:29
Crash Course Kids Preview! 10:39

Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

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In the 17th century, as the British colonies in the Americas were getting established in places like Jamestown, VA, the system of chattel slavery was also developing. Today, we'll learn about the role that slavery played in early American economy and how slavery became a legally accepted practice in the first place, and how it contributed to the colony’s early economic success. We'll look at the experiences of Anthony Johnson and John Punch to see how legal precedents that greatly influenced the development of slavery were set.

Watch our videos and review your learning with the Crash Course App!
Download here for Apple Devices: https://apple.co/3d4eyZo
Download here for Android Devices: https://bit.ly/2SrDulJ

Clint's book, How the Word is Passed: https://bookshop.org/a/3859/9780316492935

Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

Alexis B, Rene Duedam, Burt Humburg, Aziz, Nick, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, Junrong Eric Zhu, Alan Bridgeman, Jennifer Smith, Matt Curls, Tim Kwist, Jonathan Zbikowski, Jennifer Killen, Sarah & Nathan Catchings, Brandon Westmoreland, team dorsey, Trevin Beattie, Eric Koslow, Indika Siriwardena, Khaled El Shalakany, Shawn Arnold, Siobhán, Ken Penttinen, Nathan Taylor, William McGraw, Laura Damon, Andrei Krishkevich, Sam Ferguson, Eric Prestemon, Jirat, Brian Thomas Gossett, Wai Jack Sin, Ian Dundore, Jason A Saslow, Justin, Jessica Wode, Mark, Caleb Weeks

Sources and References
"Africans in Early North America, 1619-1726." African American Lives: the Struggle for Freedom, by Clayborne Carson et al., Pearson Longman, 2005

Edmund S. Morgan, American Slavery, American Freedom (New York: W.W. Norton & Company, 1975)

Ira Berlin, Many Thousands Gone: The First Two Centuries of Slavery in North America (Cambridge: Harvard University Press, 1998).

Daina Ramey Berry and Kali Nicole Gross, A Black Women’s History of the United States (Boston: Beacon Press, 2020).

Alejandro de la Fuente and Ariela J. Gross, Becoming Free, Becoming Black: Race, Freedom, and Law in Cuba, Virginia, and Louisiana (Cambridge: Cambridge University Press, 2020)

Winthrop D. Jordan, White Over Black: American Attitudes toward the Negro 1550-1812 (Chapel Hill: University of North Carolina Press, 1968)
__

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CC Kids: http://www.youtube.com/crashcoursekids

#crashcourse #history #slavery

Feeling motivated? Even if you are, do you know why? The story of Aaron Ralston can tell us a lot about motivation. In this episode of Crash Course Psychology, Hank tells us Ralston's story, as well as 4 theories of motivation and some evolutionary perspectives on motivation.

Want more videos about psychology? Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych!

--
Chapters:
Introduction: Motivation 00:00
What is Motivation? 1:08
Evolutionary Perspective: Instincts 1:29
Drive-Reduction Theory: Homeostasis & Incentives 2:37
Optimal Arousal 3:39
Maslow's Hierarchy of Needs 4:49
How Sex Motivates Us 5:29
How Hunger Motivates Us 6:32
Effects of Hunger & Starvation 7:59
How Social Belonging Motivates Us 9:33
Review & Credits 10:34
--
Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

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How do companies make money? What are profits? Revenues? How are prices set? This week, Jacob and Adriene are talking business. Whether you're selling cars, pizza, or glow sticks, this video has pretty much all the information you need to run a business. Well, not really, but there's a lot of good stuff in here.

***

Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

Mark, Eric Kitchen, Jessica Wode, Jeffrey Thompson, Steve Marshall, Moritz Schmidt, Robert Kunz, Tim Curwick, Jason A Saslow, SR Foxley, Elliot Beter, Jacob Ash, Christian, Jan Schmid, Jirat, Christy Huddleston, Daniel Baulig, Chris Peters, Anna-Ester Volozh, Ian Dundore, Caleb Weeks

--

Want to find Crash Course elsewhere on the internet?
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In which John Green teaches you, at long last, about the most exceptional bunch of empire-building nomads in the history of the world, the Mongols! How did the Mongols go from being a relatively small band of herders who occasionally engaged in some light hunting-gathering to being one of the most formidable fighting forces in the world? It turns out Genghis Khan was a pretty big part of it, but you probably already knew that. The more interesting questions might be, what kind of rulers were they, and what effect did their empire have on the world we know today? Find out, as John FINALLY teaches you about the Mongols.

Chapters:
Introduction: Wait for it...The Mongols! 00:00
What does it mean to be a nomad? 1:13
Genghis Khan 2:39
An Open Letter to Genghis Khan's Descendants 4:45
The Mongols After Genghis Khan 5:30
Five Reasons the Mongols Were Awesome 6:54
Five Reasons the Mongols Weren't Awesome 8:30
Credits 10:34

Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
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CC Kids: http://www.youtube.com/crashcoursekids

Værkstedskassen "Terninger" – Sjove og lærerige terningespil til indskolingen

Leder du efter engagerende og lærerige aktiviteter til matematikundervisningen i de yngste klasser? Så er min værkstedskasse "Terninger", udviklet i samarbejde med Gonge, et oplagt valg!

Kassen indeholder 5 forskellige værksteder med terningespil, der gør matematik sjov og legende for børn i indskolingen. Eleverne arbejder med strategier, undersøger sammen og hjælper hinanden – alt imens de styrker deres matematiske forståelse.

🎲 Hvad indeholder værkstedskassen?

Fem spændende spil og aktiviteter med terninger med fokus på samarbejde, strategi og undersøgelse.
Sjove og fagligt solide opgaver, der træner elevernes matematiske kompetencer

👉 Se videoen her, hvor jeg viser, hvordan værkstederne fungerer – og få idéer til gode spørgsmål, du kan stille undervejs:

🧩 Køb værkstedskassen her:
Gå direkte til Terninger-kassen hos Gonge: https://gongedanmark.dk/sortim....ent/anette-k-matemat

Kh
Anette

📲 Følg mig for flere idéer til matematikundervisning:

Facebook: https://facebook.com/anettekmatematik/
Instagram: https://instagram.com/anettekmatematik/
YouTube: https://www.youtube.com/channe....l/UCR8PqEuBE7OlORn2y
Hjemmeside: www.anettekmatematik.com

#værkstedsundervisning #Gongedanmark #matematikspil #terninger #indskoling #matematikmedleg

This geometry video tutorial provides a basic introduction into triangle congruence theorems. It explains how to prove if two triangles are congruent using the SSS, SAS, ASA, and AAS postulate using two column proofs. Here is a list of topics contained in the statements and reasons of the two column proofs: Definition of midpoints, reflexive property, congruent angles, perpendicular lines, right angles, vertical angles, supplements of congruent angles, angle bisectors, triangles in circles, overlapping triangles, addition property of equality, segment addition, definition of congruent segments, and segment trisectors. This video contains plenty of examples and practice problems.

2 Column Proofs of Congruent Segments:
https://www.youtube.com/watch?v=cboityRIf4Q

2 Column Proofs of Angles:
https://www.youtube.com/watch?v=kXcG6oYh3i8

Triangle Congruence - SSS, SAS, ASA:
https://www.youtube.com/watch?v=jWHOF6cFbpw

CPCTC - 2 Column Proofs With Triangles:
https://www.youtube.com/watch?v=eq1frp_ZyP8

Median of a Triangle Formula:
https://www.youtube.com/watch?v=_JdkDR4R8E4

Altitude of a Triangle - Orthocenter:
https://www.youtube.com/watch?v=oJyTKVcE4iM

_____________________________________
Triangles, Medians, & Altitudes - Proofs:
https://www.youtube.com/watch?v=ZJ_gqFidInk

2 Column Proofs - Isosceles Triangles:
https://www.youtube.com/watch?v=6Yx923Ocoh4

Angle Side Theorem - 2 Column Proofs:
https://www.youtube.com/watch?v=mwcH3nhXtPQ

Hypotenuse Leg Theorem - HL Postulate:
https://www.youtube.com/watch?v=DKSTjS0n3mY

Detour Proofs - Double Triangle Congruence:
https://www.youtube.com/watch?v=1HOrB5yvEl0

Missing Diagrams - 2 Column Proofs:
https://www.youtube.com/watch?v=IaqzuGweGZ8

_______________________________________
Final Exams and Video Playlists:
https://www.video-tutor.net/

Full-Length Videos and Worksheets:
https://www.patreon.com/MathSc....ienceTutor/collectio

You need yeast to make beer. Scientists discovered that wasps have yeast in their bellies, so why no make beer out of it! Brassneck brewery did just that so I went along to try some of their beer and find out why.

I was not sponsored by Brassneck or anyone to do this video, I made it because I find it very interesting!

Links to papers and more info:
Brewer's yeast in the gut of wasps and their survival through insect diapause:
http://www.pnas.org/content/109/33/13398.full

Yeasts hybridizing in the gut of wasps:
http://www.pnas.org/content/113/8/2247.abstract

Genetic basis for the production of insect attractants by yeasts:
http://www.sciencedirect.com/s....cience/article/pii/S

Domestication of brewer's yeast (not discussed in our video):
http://www.cell.com/current-bi....ology/fulltext/S0960

http://www.cell.com/cell/fullt....ext/S0092-8674(16)31

SFU's craft beer and brewing essentials program website:
www.sfu.ca/beer

Image credits:
Yeast image
By Masur - Own work, Public Domain, https://commons.wikimedia.org/....w/index.php?curid=10

Historical brewery
By Jost Amman - http://en.wikipedia.org/wiki/I....mage:The_Brewer_desi Public Domain, https://commons.wikimedia.org/....w/index.php?curid=86

Hellenistic Mosaics
By Georgeg - https://en.wikipedia.org/wiki/....File:Dyonisos_Paphos Public Domain, https://commons.wikimedia.org/....w/index.php?curid=31

Persian Wine
Public Domain, https://commons.wikimedia.org/....w/index.php?curid=90

Egyptian winemaking
By Ägyptischer Maler um 1500 v. Chr. - The Yorck Project: 10.000 Meisterwerke der Malerei. DVD-ROM, 2002. ISBN 3936122202. Distributed by DIRECTMEDIA Publishing GmbH., Public Domain, https://commons.wikimedia.org/....w/index.php?curid=14

Opening wasps, yeast plate, yeast under microscope
Sebastian Ibarra

-------------------------------------------------------
Professor Astro Cat Links:
http://nobrow.net/shop/profess....or-astro-cats-fronti
http://nobrow.net/shop/profess....or-astro-cats-atomic
http://nobrow.net/shop/profess....or-astro-cats-interg
http://www.minilabstudios.com/....apps/professor-astro

Find me on twitter, instagram, and my website:
http://dominicwalliman.com
https://twitter.com/DominicWalliman
https://www.instagram.com/dominicwalliman
https://www.facebook.com/dominicwalliman

There is no denying the effect that our environment has on us. Things like water and air pollution are detrimental to our health. In this episode of Crash Course Public Health, we’ll take a look at some of the ways our environment impacts us, why marginalized and low-income populations are disproportionately exposed to environmental pollution, and what we can do about it.

Check out our shared playlist with APHA: https://www.youtube.com/playli....st?list=PLDjqc55aK3k

Vanessa’s channel: https://www.youtube.com/braincraft

Sources: https://docs.google.com/docume....nt/d/1OHJiQ1njj5jWJC

Chapters:
Introduction: The Environment and Your Health 00:00
Defining our Environment 2:09
Air Pollution 3:43
Water Pollution 6:27
The Neighborhood Factor 8:11
Environmental Justice 11:59
Climate Change 12:11
Review & Credits 13:28

***
Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:
Katie, Hilary Sturges, Austin Zielman, Tori Thomas, Justin Snyder, daniel blankstein, Hasan Jamal, DL Singfield, Amelia Ryczek, Ken Davidian, Stephen Akuffo, Toni Miles, Steve Segreto, Michael M. Varughese, Kyle & Katherine Callahan, Laurel Stevens, Michael Wang, Stacey Gillespie (Stacey J), Burt Humburg, Allyson Martin, Aziz Y, Shanta, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, Junrong Eric Zhu, Alan Bridgeman, Rachel Creager, Breanna Bosso, Matt Curls, Tim Kwist, Jonathan Zbikowski, Jennifer Killen, Sarah & Nathan Catchings, team dorsey, Trevin Beattie, Divonne Holmes à Court, Eric Koslow, Jennifer Dineen, Indika Siriwardena, Jason Rostoker, Shawn Arnold, Siobhán, Ken Penttinen, Nathan Taylor, Les Aker, William McGraw, ClareG, Rizwan Kassim, Constance Urist, Alex Hackman, Jirat, Pineapples of Solidarity, Katie Dean, NileMatotle, Wai Jack Sin, Ian Dundore, Justin, Mark, Caleb Weeks
__

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This mental multiplication trick uses the idea of a third number - a base number - to help us multiply two numbers in your head. This series of videos first looks at multiplying numbers near 10 using base 10. The second video looks at multiplying using base 20 and 30. The third video looks at how to apply this mental multiplication trick to numbers near 50. The forth video the investigates ho to easilt mentally multiply numbers near to 100. Continue your mental math multiplication abilties here!

To donate to the tecmath channel:https://paypal.me/tecmath

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Check out model firearms at https://goatguns.com/?utm_source=simplehistory start building your collection today and help support Simple History

Advances in technology have led to the creation of numerous, deadly bullet designs, including: homing bullets that can track targets from hundreds of yards away, full metal jacket bullets that can penetrate the toughest of surfaces, incendiary bullets that ignite on contact, and armor-piercing bullets that remain intact as they cut through a target.

Check out our other Channel: https://www.youtube.com/channe....l/UCPdc6bs3I8s6Y4QE_
Become a Simple History member: https://www.youtube.com/simplehistory/join
Support us on Patreon: https://www.patreon.com/simplehistory

Copyright: DO NOT translate and re-upload our content on Youtube or other social media.

SIMPLE HISTORY MERCHANDISE

Get the Simple History books on Amazon:

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T-Shirts

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Credit:
Show Created by Daniel Turner (B.A. (Hons) in History, University College London)
Script: Robert de Graaf
Narrator:

Chris Kane
https://vocalforge.com/

Prime factorization and factor trees.
Every composite number can be written as a product of powers of prime numbers.
A factor tree shows the prime factors of a composite number.

For the playlist of indicies and prime numbers.
https://www.youtube.com/playli....st?list=PLjbxBzUM6SL

To contribute on Patreon:
https://www.patreon.com/tecmath To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
To support tecmath on Patreon: https://www.patreon.com/tecmath
To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

How to solve Simultaneous Equations by Elimination.

For more examples of how to solve simultaneous equations using the elimination method go here: https://www.youtube.com/playli....st?list=PLjbxBzUM6SL

To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU

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Get Dashlane free: https://dashlane.com/simplehistory or use promo code "SIMPLEHISTORY" to get 10% off Dashlane Premium

Part 1 of The Iranian Embassy Siege: https://www.youtube.com/watch?v=plEm4bv5ByQ

Become a Simple History member: https://www.youtube.com/simplehistory/join
Support us on Patreon: https://www.patreon.com/simplehistory

Copyright: DO NOT translate and re-upload our content on Youtube or other social media.

SIMPLE HISTORY MERCHANDISE

Get the Simple History books on Amazon:

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T-Shirts

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Simple history gives you the facts, simple!

See the book collection here:

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https://twitter.com/SimpleHistoryYT


Credit:
Created by Daniel Turner

Narrator:

Chris Kane
https://vocalforge.com/

Music Credit:

Darkling Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

Sources:

https://pastebin.com/X83Z1u8K

Download March of Empires for free here! https://gmlft.co/simplehistory

The attack on Fort Vaux showed no importance for the final outcome of the Battle of Verdun.
Yet the bravery of the fort defenders would make the battle famous.

Become a Simple History member: https://www.youtube.com/simplehistory/join
Support us on Patreon: https://www.patreon.com/simplehistory

Copyright: DO NOT translate and re-upload our content on Youtube or other social media.

SIMPLE HISTORY MERCHANDISE

Get the Simple History books on Amazon:

https://www.amazon.com/Daniel-....Turner-%60/e/B00H5TY

T-Shirts

https://teespring.com/stores/s....imple-history-offici

Simple history gives you the facts, simple!

See the book collection here:

Amazon USA

http://www.amazon.com/Daniel-Turner/e/B00H5TYLAE/


Amazon UK
http://www.amazon.co.uk/Daniel....-Turner/e/B00H5TYLAE


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https://twitter.com/SimpleHistoryYT


Credit:
Created by Daniel Turner
Script: Dejan Milivojevic
Narrator:

Chris Kane
https://vocalforge.com/




Sources:
Clayton Donnell, Fortifications of Verdun 1874-1917, Osprey Publishing Limited, 2011
Holstein, Christina, Fort Vaux, Pen & Sword Military, 2011
H. W. Kaufmann, J. E. Kaufmann, Verdun 1916: The Renaissance of the Fortress, Pen & Sword Military, 2016

Comment utiliser le logiciel Geogebra lors d'une étude de fonction.

Cette vidéo vous permettra :
*d'afficher une fonction.
*de dériver une fonction.
*de résoudre une équation.
*de résoudre une inéquation.
*de faire un tableau de signes.
*de faire un tableau de variations.