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
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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