Question

Упростите выражение 2sin^2x-2cos^2x​

Answer 1

2Sin²x - 2Cos²x = 2(Sin²x - Cos²x) = - 2(Cos²x - Sin²x) = - 2Cos2x

Answer 2

2sin^2x-2cos^2x=-2(cos^2x-sin^2x)=-2cos2x