1 cos 4 theta 2 theta sin 3 theta July 8, 2019 16 32 64 128 Prove that 0 =( 1 cos theta )/( 2 sin theta =( 4 )/( 3 for all theta 1 cos 2 theta cos 6 theta cos 4 theta sin 3 theta sin theta If sin theta =( 1 )/( 2 then 3 cos theta 4 cos 3 theta If sin theta 1 2 then 3 cos theta 4 cos 3 theta is equal to 1 + sin theta Cos 1 cos 2 cos 3
