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

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

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

1+ cos 2x+ cos4x + cos 6x=

int cos 2x . cos 4x . cos 6x dx

int cos 2x . cos 4x . cos 6x dx

1+ cos 2x+ cos4x + cos 6x= ............. A) 2 cos x cos 2x cos 3x B) 4 sin x cos 2x cos 3x C) 4 cos x cos 2x cos 3x D) 2 sin x cos 2x cos 3x

Prove that 1+cos2x+cos4x+cos6x =4cosx cos 2x cos 3x

Prove that: 1+cos2x+cos4x+cos6x=4cos x cos2x cos3x

If 0 cos x + cos 2x + cos 3x + cos 4x = 0 ;

int ((cos 6x+6cos 4x+ 15 cos 2x+10)/(10 cos ^(2) x +5 cos x cos 3 x+ cos x cos 5 x ))dx =f (x)+C, then f (10) is equal to: