Prove the identity: cos ((pi)/2 - x)=sin x

nidantasnu 2022-07-13 Answered
Prove the identity:
cos ( π 2 x ) = sin x
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Answers (2)

Miles Mueller
Answered 2022-07-14 Author has 11 answers
cos ( π 2 x ) = sin x
cos ( A ± B ) = cos A cos B ± sin A sin B
cos ( π 2 x ) = cos π 2 cos x + sin π 2 sin x
= 0 cos x + 1 sin x
= sin x
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Jeffrey Jordon
Answered 2022-08-01 Author has 2581 answers

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