[DTube] Proof of the Sum-Difference Formulas - Part 1

in #steemstem • 8 years ago (edited)

I'm in the process of uploading all of my Youtube videos to DTube, where they can be recorded on the Steem blockchain.

This video demonstrates just one of the geometric methods you can use to derive the sum-difference identities, which are...

zz1.png

I use circle geometry (specifically the unit circle) and how the circular functions sinθ and cosθ relate to it to set up my proof.

Please give me an Upvote and Resteem if you have found this tutorial helpful.

Please ask me a maths question by commenting below and I will try to help you in future videos.

I would really appreciate any small donation which will help me to help more math students of the world.

Tip me some DogeCoin: A4f3URZSWDoJCkWhVttbR3RjGHRSuLpaP3

Tip me at PayPal: https://paypal.me/MasterWu

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#steemiteducation #mathematics #trigonometry #dtube
8 years ago in #steemstem by
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     8 years ago 

    This post has received a 0.84% UpGoat from @shares. Send at least 0.1 SBD to @shares with a post link in the memo field.

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     8 years ago 

    This post has received a 2.06% upvote from thanks to: @masterwu.
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     8 years ago 

    You got a 0.74% upvote from @mercurybot courtesy of @masterwu!

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