Cos3n/8 sin 5n/24 -cos 5n/24 sin 3n/8

Question

Cos3n/8 sin 5n/24 -cos 5n/24 sin 3n/8

Answer 1

Cosαsinβ-cosβsinα=sin(α+β)
выражение в условии равно sin(3π/8+5π/24)=sin(14π/24)=sin(7π/12)