" 8."3-2cos x-4sin x-cos2x+sin2x=0

cos^(2)x-2cos x=4sin x-sin2x

If cos^(2)x-2cos x-4sin x+sin2x=0 , then tan((x)/(2)) can be equal to

(1+sin x+cos x+sin2x+cos2x)/(tan2x)=0

(" sin 8x cos x- sin 6x cos 3x")/(" cos 2x cos x - sin 4x sin 3x")=

4sin x cos x+2sin x+2cos x+1=0

Show that (sin 8x cos x - sin 6x cos 3x)/(cos 2x cos x - sin 3x sin 4x) = tan 2x

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.

Evaluate: int(3+2cos x+4sin x)/(2sin x+cos x+3)dx

Solve the equation 4sin x cos x+2sin x+2cos x+1=0

The value of (2(sin2x+2cos^(2)x-1))/(cos x sin x cos3x+sin3x) is