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I need help on number 59. It makes no sense to me, I cannot figure out how I would use Pythagorean identities to solve this. Please help!
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I need help on number 59. It makes no sense to me, I cannot figure out how I would use Pythagorean identities to solve this. Please help!

I need help on number 59. It makes no sense to me, I cannot figure out how I would-example-1
User Igor Krivokon
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1 Answer

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If you have never used a unit circle, I recommend making one.
R for the following degrees are
30*= 4((3^1/2)/2)^2
60*= 8(2^1/2)(2^1/2)^2
90*= (8((3^1/2)/2))/4
User Peedi
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