how do you verify cos3x=4cos^3x-cosx???

8 sin 9x cos3x Rewrite the xpression as a sum or differnce using one of the product sum formulas Si...

what's the derivative of cos3x

integrate (cos3x)^2/(1-2pcos(2x)+p^2) dx from x=0 to 2pi for 0<p<1

Verify Identity: cos5x-cos3x=-8sin^2x(2cos^3x-cosx)

y=cos3x(sin^3)x

Solve the equation cos3x=1^2 where x is radian

(cos3x)^2+(sin3x)^2=cos(f(x)) find f(x)

(cos3x)^4+(sin3x)^4=cos(g(x)) find g(x)

lim x→0 of [2-cos3x-cos4x]/(x)

Find all solutions of 2(cos3x)^2+6cos3x=3 on [0,2π). Round to the nearest thousandth....

Asked by lindsey edler