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Trigonometry made easy
Trigonometry made easy Teacherflix 18 Views • 2 years ago

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles. In this video we look at the use of trigonometry with right triangles, solving for both sides and angles.

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BTW for those interested - the history of trigonometry history is fascinating!
The field emerged in the Hellenistic world during the 3rd century BC from applications of geometry to astronomical studies.
The use of trigonometry really took off due to it's use in navigation - trigonometry has been used for locating latitudes and longitudes of sailing vessels, plotting courses, and calculating distances during navigation.
Trigonometry is still used in navigation through such means as the Global Positioning System and artificial intelligence for autonomous vehicles.

But the truly cool trigonomic endevour was The Great Trigonomical Survey.
The Great Trigonometrical Survey was a project which aimed to measure the entire Indian subcontinent with scientific precision. It was begun in 1802 and completed of it in 1871.
Among the many accomplishments of the survey was measurement of the height of the Himalayan giants: Everest, K2, and Kanchenjunga. The Survey had an enormous scientific impact as well, being responsible for one of the first accurate measurements of a section of an arc of longitude.
Triangulation surveys were based on a few carefully measured baselines and a series of angles. The initial baseline was measured with great care, since the accuracy of the subsequent survey was critically dependent upon it. Various corrections were applied, principally temperature. An especially accurate folding chain was used, laid on horizontal tables, all shaded from the sun and with a constant tension. The early surveys made use of large and bulky theodolites made by William Carey, a Zenith sector made by Jesse Ramsden and 100-foot (30 m) chains!
Interesting aside - Everest was one of the leaders of the survey - and his name was pronounced Eve-rest not Ever-est! To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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The Game of Nim - a math game of strategy using matchsticks!
The Game of Nim - a math game of strategy using matchsticks! Teacherflix 10 Views • 2 years ago

This video was sponsored by Skillshare.
The first 1000 people to use the link will get a free trial of Skillshare Premium Membership.
https://skl.sh/tecmath10201

The game of nim is an easy to learn math strategy game, that can be played anywhere with matchsticks, rocks, twigs....
But best of all, whilst it looks fair, there is a math strategy you can employ to win everytime!

Game of Nim link: https://www.archimedes-lab.org..../game_nim/play_nim_g

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Peppa Pig and the Backyard Circus - Children's Stories Read Aloud - Peppa Pig Books for Kids
Peppa Pig and the Backyard Circus - Children's Stories Read Aloud - Peppa Pig Books for Kids Teacherflix 52 Views • 2 years ago

Peppa Pig and the Backyard Circus - Children's Stories Read Aloud - Peppa Pig Books for Kids

Click here to purchase :
https://www.amazon.com/Peppa-B....ackyard-Circus-Candl

Step right up to Peppa’s circus — just the ticket for little fans!

Grandpa Pig is busy setting up a big tent in the backyard for Granny Pig’s garden party, but Peppa thinks it looks more like a circus tent. What could be better than to put on a circus show during the party? Danny Dog can be the strong man, Suzy Sheep the juggler, and George can wow the crowd as one of the cyclists. And it’s Peppa’s job to make sure the amazing feats go according to plan — she’s the ringmaster, of course!

Jack and the Leprechaun - Children's Stories Read Aloud - St. Patrick's Day Stories for Ki
Jack and the Leprechaun - Children's Stories Read Aloud - St. Patrick's Day Stories for Ki Teacherflix 172 Views • 2 years ago

Jack and the Leprechaun - Children's Stories Read Aloud - St. Patrick's Day Stories for Kids
by Ivan Robertson
Illustrated by Katy Bratun

Click here to purchase Jack and the Leprechaun:
https://www.amazon.com/Jack-Le....prechaun-Pictureback

It's St. Patrick's Day, and Jack Mouse is visiting his cousin Sean in Ireland. Sean tells Jack about the myth of leprechauns, and Jack is determined to catch one for himself! Children will delight in learning about Irish folk tales and traditions and the customs of St. Patrick's Day in this brand-new Pictureback®.

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