Sin3x*cos x - sin x*cos 3x=1

Question

Sin3x*cos x - sin x*cos 3x=1

Answer 1

sin3x*cos x - sin x*cos 3x=1 по формуле разности:

Sin(3x - x) = 1

Sin2x = 1

2x = π/2 + 2πn

x = π/4 +πn