Find the general solution : `cos 4x = cos 2x`

Find the general solution : cos 3x + cos x cos 2x = 0

Find the general solution : sin 2x + cos x = 0

Find the general solution of sin5x cos 3x = sin9x cos7x

The general solution of cos x cos 6x =-1 is

Find the general solution of sin 2 theta = cos theta.

Find the general solution of 1+sin^3x + cos^(3)x=(3)/(2)sin 2x

The order of the differential equation whose general solution is y = c_(1) cos 2x + c_(2) cos^(2) x + c_(3) sin^(2) x + c_(4) is

Find the most general solution of 2^1|cosx|+cos^2x+|cosx|^(3+oo)=4

cos(x)cos(2x)cos(3x)=1/4 . Find the general solution.

Find the most general solution for 2^(sin x )+2^( cos x )=2^((1-(1/sqrt2)))