" 14."cos^(3)2x+3cos2x=4(cos^(6)x-sin^(6)x)

prove that cos^(3)(2x)+3cos2x=4(cos^(6)x-sin^(6)x)

if sin x+sin^(2)x=1 then cos^(12)x+3cos^(10)x+3cos^(8)x+cos^(6)x=

If sinx + sin^(2)x =1 then cos^(12)2x + 3cos^(10)x+3cos^(8)x + cos^(6)x =

The sum of the solutions x in of the equation frac{3 cos 2x cos^3 2x}{cos^6 x - sin^6 x} = x^3 - x^2 6 is

If sin x + sin^(2) x =1 " then " cos^(8) x + 2 cos^(6) x + cos^(4) x =

8cos x cos2x cos4x = (sin6x) / (sin x)

cos ^(2) 2x -cos ^(2) 6x = sin 4x sin 8x

cos ^(2) 2x -cos ^(2) 6x = sin 4x sin 8x

cos ^(2) 2x -cos ^(2) 6x = sin 4x sin 8x

cos ^(2) 2x -cos ^(2) 6x = sin 4x sin 8x