cos theta=(-1)/(3)

cos theta cos2 theta cos3 theta=(1)/(4)

Solve for theta,theta in[0,pi],cos theta cos2 theta cos3 theta=(1)/(4)

If cos theta=(1)/(2)(a+(1)/(a)) then show that cos3 theta=(1)/(2)(a^(3)+(1)/(a^(3)))

Solve the following equation: cos theta cos2 theta cos3 theta=(1)/(4)

Find all value of theta, between 0& pi, which satisfy the equation; cos theta*cos2 theta*cos3 theta=(1)/(4)

If theta=(pi)/(7), prove that cos theta cos2 theta cos3 theta=(1)/(2^(3))

cos2theta+(1)/(3)cos^(3)2theta+(1)/(5)cos^(5)2theta+....=

Solve cos theta cos 2 theta cos 3theta =(1)/(4)

Solve : If (1)/(cos theta)+(1)/(cos 3theta)=(1)/(cos 5theta)