[" Prove that: "],[qquad [" (in "3x+sin2x-" sin "],[=4sin x cos(x)/(2)cos(3x)/(2)]]

sin 3x + sin 2x - sin = 4sin x cos "" x/2 cos "" (3x)/(2)

sin 3x + sin 2x - sin = 4sin x cos "" x/2 cos "" (3x)/(2)

sin 3x + sin 2x - sin = 4sin x cos "" x/2 cos "" (3x)/(2)

sin 3x + sin 2x - sinx = 4sin x cos "" x/2 cos "" (3x)/(2)

Prove that sin 3x + sin 2x - sin x = 4 sin x cos ""(x)/(2) cos "" ( 3x )/(2)

Prove that: \ sin3x+sin2x-sin x=4sin xcos(x/2)cos((3x)/2)

Prove that sin3x+sin2x-sinx=4sinxcos(x/2)cos((3x)/2)

Prove that sin3x+sin2x-sinx=4sinxcos(x/2)cos((3x)/2)

Prove that sin3x+sin2x-sinx=4sinxcos(x/2)cos((3x)/2)

Prove that: (i) sin 3x+"sin" 2x-"sin" x = 4 sin x cos((x)/(2))cos((3x)/(2)) (ii) ("sin" 3x+"sin" x)"sin" x+(cos 3x-cos x)cos x=0.