Решить : cos pi\8 cos x = sin pi\8 sin x + 1

Question

Решить : cos pi\8 cos x = sin pi\8 sin x + 1

Answer 1

Cos π/8 · cos x - sin π/8 · sin x = 1
cos(x + π/8) = 1
x + π/8 = 2πn
x = - π/8 + 2πn