Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/e/trig_addition_identities?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry

Watch the next lesson: https://www.khanacademy.org/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/v/cosine-addition-identity-example?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry

Missed the previous lesson?
https://www.khanacademy.org/math/trigonometry/less-basic-trigonometry/angle-addition-formulas-trig/v/cosine-angle-addition-2?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry

Trigonometry on Khan Academy: Big, fancy word, right? Don't be fooled. Looking at the prefix, tri-, you could probably assume that trigonometry ("trig" as it's sometimes called) has something to do with triangles. You would be right! Trig is the study of the properties of triangles. Why is it important? It's used in measuring precise distances, particularly in industries like satellite systems and sciences like astronomy. It's not only space, however. Trig is present in architecture and music, too. Now you may wonder...how is knowing the measurement and properties of triangles relevant to music?? THAT is a great question. Maybe you'll learn the answer from us in these tutorials!

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Trigonometry channel:
https://www.youtube.com/channe....l/UCYQSs1lFJZKpyqNQQ
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

How many toys are on Peck's shelf? The last number you say is the number of toys! Learn how to count to ten with Peck the Bird from Khan Academy Kids.

See the full Counting 1-10 playlist, here: http://khan.co/KhanKids-Counting.

Visit us at http://www.khankids.org to learn more about Khan Academy Kids, a free educational app for preschool through 2nd grade.

Available on Google Play, Apple, and Amazon app stores:
➡️ http://khan.co/KhanKids-YT-Google
➡️ http://khan.co/KhanKids-YT-Apple
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Subscribe to our channel for more videos like this.

For an indefinite integral, the constant of integration is usually represented with +C. It represents the constant that can not be determined while completing an indefinite integral without extra information.

If we have a solution to the function we get when we take the integral, we can find the appropriate value of C for the given problem.

0:00 Intro
0:15 Demonstration of where +C comes from
2:23 Process for finding C value

#+C
#ConstantOfIntegration
#Calculus
#Integral
#Antiderivative
#JoeCMath

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#Shorts

By Ruslana Westerlund Ed.D. (2 September 2021) A brief description of the WIDA 2020 Standards by focusing on the main components of the framework with a closer look at the Language Expectations.

TEAC731 Responsive Pedagogy for ELs
Education
Graduate School
Education K-12 (M.A.)
Graduate School
M.A. Education K-12
Ruslana Westerlund

https://www.bethel.edu/admissions/

In this live and interactive conversation with English language teachers from around the world, we explore how to get the best out of artificial intelligence with effective prompts.

We're joined by Mary Rose Banaag who is a business English teacher from the Philippines with more than 15 years in training and development. She focuses on tailored training programmes in English communication skills for B2B and B2C clients. She is also a certified TOEFL trainer.

#TeachingEnglish #ELTtech #ELTplanning #AIinELT

Stephen Hawking thought an asteroid impact posed the greatest threat to life on Earth. Thanks to Kiwico for sponsoring this video. For 50% off your first month of any crate, go to https://kiwico.com/veritasium50
For other potential world ending catastrophes, check out Domain of Science: https://ve42.co/DoS

Special thanks to:
Prof. Dave Jewitt from UCLA Earth, Planetary, and Space Sciences
Prof. Mark Boslough from Sandia National Labs
Scott Manley: https://www.youtube.com/user/szyzyg
Ryan Wyatt at Morrison Planetarium
Prof. Amy Mainzer
Alexandr Ivanov for the opening shot of Chelyabinsk Meteor

Maps of Asteroid Impacts —https://ve42.co/Map

Time passing animation from Universe Sandbox - http://universesandbox.com/

Opposition Effect — https://ve42.co/Belskaya2000
Belskaya, I. N., & Shevchenko, V. G. (2000). Opposition effect of asteroids. Icarus, 147(1), 94-105.

Potentially Hazardous Asteroids — https://ve42.co/Perna2013
Perna, D., Barucci, M. A., & Fulchignoni, M. (2013). The near-Earth objects and their potential threat to our planet. The Astronomy and Astrophysics Review, 21(1), 65.

Survey of Potentially Hazardous Asteroids — https://ve42.co/NEOSurvey

Population Vulnerability — https://ve42.co/Rumpf2017
Rumpf, C. M., Lewis, H. G., & Atkinson, P. M. (2017). Population vulnerability models for asteroid impact risk assessment. Meteoritics & Planetary Science, 52(6), 1082-1102.

Size distribution of NEOs — https://ve42.co/Trilling17
Trilling, D. E., Valdes, F., Allen, L., James, D., Fuentes, C., Herrera, D., ... & Rajagopal, J. (2017). The size distribution of near-earth objects larger than 10 m. The Astronomical Journal, 154(4), 170.

2020 NEOWISE Data Release — https://ve42.co/NEOWISE

National Research Council Report— https://ve42.co/Defending
Board, S. S., & National Research Council. (2010). Defending planet earth: Near-Earth-Object surveys and hazard mitigation strategies. National Academies Press.

Tug Boat — https://ve42.co/Schweickart03
Schweickart, R. L., Lu, E. T., Hut, P., & Chapman, C. R. (2003). The asteroid tugboat. Scientific American, 289(5), 54-61.

Gravity Tractor 1 — https://ve42.co/Lu05
Lu, E. T., & Love, S. G. (2005). Gravitational tractor for towing asteroids. Nature, 438(7065), 177-178.

Laser Ablation — https://ve42.co/Thiry14
Thiry, N., & Vasile, M. (2014). Recent advances in laser ablation modelling for asteroid deflection methods. SPIE Optical Engineering+ Applications, 922608-922608.

Yarakovsky Effect — https://ve42.co/Yara

DART Mission — https://ve42.co/DART

Nuclear 1 — https://ve42.co/Ahrens92
Ahrens, T. J., & Harris, A. W. (1992). Deflection and fragmentation of near-Earth asteroids. Nature, 360(6403), 429-433.

Nuclear 2 — https://ve42.co/Bradley10
Bradley, P. A., Plesko, C. S., Clement, R. R., Conlon, L. M., Weaver, R. P., Guzik, J. A., ... & Huebner, W. F. (2010, January). Challenges of deflecting an asteroid or comet nucleus with a nuclear burst. In AIP Conference Proceedings (Vol. 1208, No. 1, pp. 430-437). American Institute of Physics.

Researched and Written by Petr Lebedev, Jonny Hyman and Derek Muller
3D animations, VFX, SFX, Audio Mixing by Jonny Hyman
2D animation by Ivy Tello
Intro animation by Nicolas Pratt
With Filming by Raquel Nuno

Music from https://epidemicsound.com "Stellar Dance" "Orbit" "That Notebook" "What We Discovered" "Out of Poppies" "Handwriting"
Images and video supplied by Getty Images

TeacherTube User: Ldulane3

TeacherTube URL: http://www.teachertube.com/vie....wVideo.php?video_id=

This is a math video lesson to help you with new math, math tricks, and or simple math questions you may have.

This is a video for Kindergarten students that addresses the standard MKM1 for common properties of objects.

What is Christmas English Vocabulary is fun holiday learning for all ages. Discover the reason for the season and what the various symbols of Christmas really mean. Vocabulary words in English are pronounced, spelled, and defined. Simple definitions and kids will love the interesting format and variety of backgrounds. Mr. Pencil hosts your public and homeschool classroom learning lessons. _____ Welcome to the Complete K12 Essentials Youtube channel! ____ __________________________________________________________________________
_____ Please “LIKE” and “SUBSCRIBE” to this channel.______ New videos posted every Tuesday. _____ https://youtube.com/channel/UC...._XYRUNkxt9636TWXdgJ9 _________________ ___________________________________________________________________________
_____ NEW : We have introduced interactive worksheets, puzzles, and quizzes on www.CompleteK12Essentials.com We have quick links to seamlessly move from our website to our Youtube channel. ___________________________________________________________
_____ Additional videos in this series will follow, so be sure to subscribe to our channel and tell a friend. If you have comments or suggestions on future videos please visit our channel link above.

Discover hundreds of never-before-seen resources! Create your free account at https://my.happylearning.tv/ and start learning in the most entertaining way.

This physics video tutorial explains how to solve any resistors in series and parallel combination circuit problems. The first thing you need to do is calculate the equivalent resistance of the circuit which you can use to calculate the current flowing from the battery based on ohm's law. Using the current and the voltage drops across each resistor, you can calculate the electric potential at every point in the circuit which will allow you to calculate the current flowing through any resistor. This technique is useful if there's not multiple batteries in different loops of the equation. Keep in mind, the current flowing in two resistors that are in series with each other is the same. The voltage is the same across resistors connected in parallel. This video contains plenty of examples and practice problems including a current division formula for resistors connected in parallel.

Schematic Diagrams & Symbols:
https://www.youtube.com/watch?v=Dl1gFBNa0Ik

Resistors In Series:
https://www.youtube.com/watch?v=9z53qVQjasU

Resistors In Parallel:
https://www.youtube.com/watch?v=SYrOiQs3X2U

Series and Parallel Circuits - Light Bulb Brightness:
https://www.youtube.com/watch?v=NjgxXcBfIII

Equivalent Resistance of Complex Circuits:
https://www.youtube.com/watch?v=kjW4H3fKi8o

_________________________
Voltage Divider Circuit:
https://www.youtube.com/watch?v=JGXdi7XcQi8

Current Dividers:
https://www.youtube.com/watch?v=PpfOH_uBKCw

Parallel Circuit Challenge Problem:
https://www.youtube.com/watch?v=y-gwr8LCHKo

Kirchhoff's Current Law:
https://www.youtube.com/watch?v=Q39xQUlTGew

Kirchhoff's Voltage Law:
https://www.youtube.com/watch?v=6F_rmZ1nXFQ

DC Circuits Review:
https://www.youtube.com/watch?v=wejz5s31Cts

____________________________
KCL and KVL Circuit Analysis:
https://www.youtube.com/watch?v=2Zu3ppq3n8I

Thevenin's Theorem - Circuit Analysis:
https://www.youtube.com/watch?v=zTDgziJC-q8

Norton's Theorem - Circuit Analysis:
https://www.youtube.com/watch?v=-kkvqr1wSwA

Superposition Theorem:
https://www.youtube.com/watch?v=EX52BuZxpQM

Maximum Power Transfer:
https://www.youtube.com/watch?v=8CA6ZNXgI-Y

Physics PDF Worksheets:
https://www.video-tutor.net/ph....ysics-basic-introduc

Watch our Champ Siblings perform amazing calculations within seconds
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Check out these 15 cool Makey Makey project ideas that you can use to jazz up your STEM sessions. Each idea is ready to rock n roll with guides on the Instructables website. Educators, get exclusive updates and resources straight to your inbox: http://surfingscratcher.com/re....commends/downloads/s

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➡️Makey Makey Blog: https://makeymakey.com/blogs/b....log/meet-the-2019-20

➡️1) Water Piano: https://www.instructables.com/....id/Makey-Makey-and-t
➡️2) Show Buzzer: https://www.instructables.com/....id/Makey-Makey-Game-
➡️3) Biography Bottles: https://www.instructables.com/....id/Biography-Bottles
➡️4) Game Controllers: https://www.instructables.com/....id/Makey-Makey-Game-
➡️5) Exit Ticket: https://www.instructables.com/....id/MakeyMakey-Exit-T
➡️6) Newsroom: https://www.instructables.com/....id/Makey-Makey-Morni
➡️7) Interactive Posters: https://www.instructables.com/....id/Interactive-Poste
➡️8) Christmas Lights: https://www.instructables.com/....id/MaKey-MaKey-Chris
➡️9) Racing Track: https://www.instructables.com/....id/Smart-Racing-Trac
➡️10) Coding Recipes: https://www.instructables.com/....id/Magical-Coding-Re
➡️11) Light up Houses: https://www.instructables.com/....id/Makey-Makey-Chibi
➡️12) Human Body: https://www.instructables.com/....id/El-Cuerpo-Humano-
➡️13) Digital Orchestra: https://www.instructables.com/....id/MAKEY-MAKEY-DIGIT
➡️14) Solar System: https://www.instructables.com/....id/SunEarth-and-Moon
➡️15) Portable Keyboard: https://www.instructables.com/....id/Makey-Makey-Porta

➡️Google Earth: https://earth.google.com/web

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Surfing Scratcher receives a percentage of the purchase price when you make a purchase through some of these links.
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Educators and teachers, you can find unplugged lessons, resources and activities to purchase for this tutorial series on my website here:

➡️Educational Resources: https://www.surfingscratcher.com/shop/
➡️Browse my Teachers Pay Teachers Store: https://bit.ly/2Tq45lH

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📝📝📝 VIDEO DESCRIPTION 📝📝📝
The latest Makey Makey ambassadors have been announced, and their projects are all on Instructables. There's some really cool experiences.

We'll tour around the globe using Google Earth as I tell you a snippet about their projects and what excites me about each one.

You can check the Makey Makey blog article for social media contacts for each educator. Reach out, as I'm sure they'd love to hear from you!

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❓🤔❓ WHAT IS SURFING SCRATCHER? ❓🤔❓

Surfing Scratcher wants to show learners, students, educators and teachers how to learn mathematics through coding games online with Scratch 3 programming projects. Whether you are a Scratch beginner, or you're an educator wondering how to use Scratch in your classroom or looking for lessons & resources for your classroom, Surfing Scratcher is here to help you on your journey.

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#beyondthebanana #makeymakey #instructables

How do ecosystems change over time?
Ecological succession, also called Biological succession occurs when one ecological community changes into another.
There are two main types of ecological succession.
Primary and Secondary Succession.
Primary Succession occurs when there is no soil and the new community has to start without any soil.
Secondary succession occurs when an event destroys an area but the soil remains.
The pioneer species are the first plants to appear in the new ecosystem.
*
*
For more Life Science videos and summaries see,
http://www.moomoomath.com/Midd....le-School-Science-an

You're already learning on YouTube — why not get college credit for it? https://link.gostudyhall.com/my1

In this episode of Crash Course: How to College, Erica talks us through what preparing for college could entail and how we can be active in that preparation. Applying to college is exciting and stressful and lots of other things that cause a whole lot of emotions. But you can take steps now that will make the college admissions process a lot easier once you get to that point.

***
Now you can take top-tier college courses with Study Hall! Study Hall videos are available to watch at no cost, and first-year courses are $25 to sign-up and begin coursework. Once you're satisfied with your grade, receive credit for only $400. Sign up at https://link.gostudyhall.com/my1

Follow Study Hall on socials!
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_______________________________________________
Chapters:
0:00 - Introduction
0:51 - Getting organized
1:24 - Goals
2:25 - Courses
3:36 - Standardized tests
6:12 - Figuring out your interests
_______________________________________________

Links to the resources listed in this video:
GED: https://ged.com/
Kaplan: https://www.kaptest.com/study/
Career assessment tests: https://www.careeronestop.org/ https://www.mynextmove.org/explore/ip
National College Attainment Network: https://www.ncan.org/general/c....ustom.asp?page=Membe
Upward Bound: https://www2.ed.gov/programs/t....rioupbound/index.htm

Crash Course: How to College is part of Study Hall, a partnership between ASU and Crash Course. Head over to our new Study Hall channel to check out our Fast Guide series which break down different college majors.

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Watch our videos and review your learning with the Crash Course App!
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Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

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