1 cos 4 theta 2 theta sin 3theta
- Sin 4 theta cos 4 theta 1 cosec 2 theta 2
- Sin theta sin 2 theta 1 then cos 2 theta cos 4 theta
- Sin theta sin 2 theta 1 prove that cos 2 theta cos 4 theta 1
- Cos theta 1 sin theta tan pi 4 theta 2
- Sin 4 theta cos 4 theta 1 2sin 2 theta * cos 2 theta
- Sin theta sin 2 theta 1 show that cos 2 theta cos 4 theta 1
- Sin 4 theta cos 4 theta 1 2cos 2 theta
- Cos 2 theta 1 sin 2 theta tan π 4 theta
- 4 1 sin theta cos theta )/( 1 sin theta cos theta cot theta 2
- Sin theta sin 2 theta 1 then prove cos 2 theta cos 4 theta 1
- 1 2 cos square theta cos 4 theta sin 4 theta
- Siddh kijiye sin 4 theta cos 4 theta 2 sin 2 theta 1
- (1 - cos^4 theta)/(sin^4 theta) = 1 + 2 cot^2 theta