Question

cos (x-y/2) ×cos (x-y/2) =1/2

Answer 1

Ответ:

Объяснение:

Cos^2(x-y/2) = 1/2

cos(x-y/2) = ±√2/2

x-y/2 = π/4 + πk/2, k є Z

x= y/2 + π/4 + πk/2, k є Z