cos^(2)theta=(1)/(4)

cos^(2)theta+(1)/(2)cos^(4)theta+(1)/(3)cos^(6)theta+....=

|2sin theta-csc theta|>=1 and theta!=(n pi)/(2),n in Z|2sin theta-csc theta|>=1 and theta!=(n pi)/(2),n in Z then cos2 theta>=(1)/(2)(b)cos2 theta>=(1)/(4)cos2 theta<=(1)/(2)(d)cos2 theta<=(1)/(4)

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

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

Solve : cos theta cos 2 theta cos 3 theta =(1)/(4) (0 le theta le pi)

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

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)

Solve the following equation: sin^(2)theta-cos theta=(1)/(4)