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Originally Posted by God of Twilight
Actually both sides are supposed to equal .809016994
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This is true. That's the value I got.
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Eldin, could you give examples of other problems that need to be solved in the same way, and show how you solved them?
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This is an extra credit problem. It is far more advanced then any of the other problems I've done.
Basically, we've used the pythagorean identity (sin 2* + cos 2 = 1) and its variants, reciprocal identities, angle addition identities and so on. The class this is for is Trigonometry.
*Where 2 actually means squared.
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What if you change cos(pi/5) to cos36 degrees.
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It doesn't matter if it is in radians or degrees.
It
technically works, but I don't think that's exactly what he's looking for.