cos5 theta-16cos^(2)theta-20cos^(2)theta+5cos theta

Prove that cos5theta=16cos^(5)theta-20cos^(3)theta+5costheta .

If cos5 theta-a cos^(5)theta+b cos^(3)theta+c cos theta then c is equal to-

The maximum value of 16cos^(5)theta-20cos^(3)theta+5cos theta is

Prove that cos 50 = 16 cos^(5)theta - 20 cos^(3) theta + 5 cos theta

Prove that 16 cos ^(5) theta - 20 cos ^(3) theta + 5 cos theta = cos 5 theta.

If cos5 theta=a cos^(5)theta+b cos^(4)theta+c cos^(3)theta+d cos^(2)theta+e cos theta then which of the following is incorrect? (i)a=16(ii)b=5(iii)c=-20(iv)e=

2cos theta-cos3 theta-cos5 theta-16cos^(3)theta sin^(2)theta=

2cos theta-cos3 theta-cos5 theta-16cos^(3)theta sin^(2)theta=

Prove that: (cos6 theta+6cos4 theta+15cos2 theta+10)/(cos5 theta+5cos3 theta+10cos theta)=2cos theta