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protestommb 2022-06-27 Answered
How can 2 cos ( x π 2 ) = 2 sin ( x π 2 )
I know that cos ( x ) = cos ( x ) and that cos ( π 2 x ) = sin ( x )
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Answers (1)

hildiadau0o
Answered 2022-06-28 Author has 21 answers
2 cos ( x π 2 ) = 2 sin ( x π 2 )
tan ( x π 2 ) = 1 = tan ( π 4 )
x π 2 = n π π 4
where n is any integer
Clearly, the given relationship is not an identity

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