SOLUTION: Prove the identity: cot(^2)x-1 / cot(^2)x+1 = cos2x

SOLUTION: Prove the identity: cot(^2)x-1 / cot(^2)x+1 = cos2x

Algebra.Com

Question 982592: Prove the identity:
cot(^2)x-1 / cot(^2)x+1 = cos2x
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
cot(^2)x-1 / cot(^2)x+1 = cos2x

cos(2x)

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