Question

Упростите выражение: cos(π/6+α)-√3/2 cosα

Answer 1

cos(π/6+α)-√3/2 *cosα=cospi/6*cosa-sinpi/6*sina-√3/2 *cosα=√3/2 *cosα-1/2 * sina-√3/2cosα=-1/2 *sina