Question

How do you simplify `sin^2(2x) - cos^2(2x)`?

Answer 1

`=>-cos4x`

Explanation:

`sin^2(2x) - cos^2(2x)`

`=>-(cos^2(2x)-sin^2(2x) )`

`=>-cos4x`

Applying identity `cos^2x-sin^2x=cos2x`