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If f(alpha,beta)=cos^2alpha+sin^2alphaco...

If `f(alpha,beta)=cos^2alpha+sin^2alphacos2beta` then which of the following is incorrect

A

`f(pi/5, (2pi)/5) ne f((2pi)/5, pi/6)`

B

`f(pi/12, pi/3)= f(pi/3, pi/12)`

C

`3f(pi/5, pi/3) ne f(pi/3, pi/5)`

D

`f(pi/4, pi/18) ne 3f(pi/18, pi/4)`

Text Solution

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The correct Answer is:
A
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