Youtor
Why sin30˚ equals 12
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=zfUs6iV455o
Using some simple geometry, Pythagoras' Theorem and laws of trigonometry, we can easily derive the exact values for sine, cosine and tangent of the angles of 30˚, 45˚ and 60˚. • You may have been expected to remember values such as sin(30˚) = 1/2, sin(45˚) = √2/2, sin(60˚) = √3/2. Unfortunately, this is pretty boring stuff to try and remember. • What's far more interesting however, is where these values come from. In deriving the results, you will also gain a better understanding of how trigonometry works. • For the angle of 45˚, we use a 45˚-45˚-90˚ triangle to derive the results. • For the angles of 30˚ and 60˚, we use a 30˚-60˚-90˚ triangle to derive the results. • Thanks for watching. Please give me a thumbs up if you have found this video helpful. • Please ask me a maths question by commenting below and I will try to help you in future videos. • Tip me some DogeCoin: A4f3URZSWDoJCkWhVttbR3RjGHRSuLpaP3 • Tip me at PayPal: https://paypal.me/MasterWu • Follow me on Twitter! twitter.com/MasterWuMath
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