" (viii) "cos x-sin3x=cos2x

cosx - sin3x = cos2x

Prove that : (cos 4x sin 3x - cos 2x sin x)/(sin 4x .sin x + cos 6x .cos x) = tan 2x

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

(i) cos3x=cos2x (ii) cos5x=sin3x (iii) cosmx=sinnx

(sin3x-sinx)/(cos2x) =

Solve 4cos x(2 -3sin^(2)x)+cos2x+1=0

Find the number of solutions of the equation sin5x cos3x=sin6x cos2x,x in[0,pi]

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

The period of the function f(x)=( sin 8x cos x-sin 6x cos 3x )/(cos 2x cos x- sin 3x sin 4x ) is

The least difference between the roots,in the first quadrant (0<=x<=(pi)/(2)), of the equation 4cos x(2-3sin^(2)x)+(cos2x+1)=0, is