Question

(1+cos4x)*sin(2x)=cos^2(2x)

Answer 1

You asked this some time back

Answer 2

He's trollin'

Answer 3

Last time it was (1-cos4x)*sin(2x)=cos^2(2x)

Answer 4

1+cos^2(4x)=2cos^2(2x)

Answer 5

And how did you get it?

Answer 6

Its an identity
can be proved using compund angle formula

Answer 7

Ok , thanks.