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Cos (x+π/2)=sinx...but if this whole function is powered by even number what will be the answer?

1 Answer

Jul 4, 2018

If you're asking if

#cos^n(x+\pi/2) = sin^n(x)#

for every even #n#, the answer is yes. Actually, its' true for every exponent #n#.

Since you have the initial equality #x=y#, then #x^n=y^n# must always hold.

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