" (i) "cos x*cos2x*cos3x

Prove that 1 + cos 2x + cos 4x + cos 6x = 4 cos x *cos 2x *cos 3x .

Differentiate the functions given w.r.t.x: cos x*cos2x*cos3x

Find the fundamental period of f(x)=cos x cos2x cos3x

what is the fundamental time period of f(x)=cos x.cos2x cos3x

If lim_(x rarr0)(1-cos x*cos2x*cos3x...cos nx)/(x^(2)) has the value equal to 263, find the value of n ( where n in N)

If int cos x cos 2x cos 3x dx = A_(1)sin 2x + A_(2) sin 4x + A_(3) sin 6x + C then

int cos x cos 2x cos 3x dx=

Prove that 1 + cos 2x + cos 4x + cos 6x = 4 cos x cos 2x cos 3x

1+ cos 2x + cos 4 x+ cos 6x- 4 cos x cos 2x cos 3x =