THE GATEBOOK

Normalization Lectures

Which of the above are CORRECT ?

A. Only (A)

B. (A) and (C)

C. (B) and (C)

D. (B) and (D)

As you can see, there are 4 points in where

And also f(x)=cos2x+cos4x attains its maximum value at x=0.

So option C.(B) and (C) is correct.