" 15."sin^(3)x*sin3x

Find the least positive angle measured in degrees satisfy sin^(3)x+sin^(3)2x+sin^(3)3x-(sin x+sin2x+sin3x)^(3)

If sin^(3)x cos3x+cos^(3)x sin3x=(3)/(8), then the value of 8sin4x is _(-)

If sin ^(2) x + (1)/(4) sin^(2) 3x = sin x sin^(2) 3 x then x =

(sin x)/(sin 3x)

If sin^(3) x cos 3x + cos^(3) x sin 3x = 3//8 , then the value of 8 sin 4x is ____________.

If sin^(3)x cos3x+cos^(3)x sin 3x=3//8 , then the value of sin 4x is ___________

If sin^(3)x cos3x+cos^(3)x sin 3x=3//8 , then the value of sin 4x is ___________

Prove that: sin3x=3sinx-4sin^3x