इन समीकरण को हल कीजिये `sin theta +sin 2theta +sin 3theta =0`

sin theta + sin3 theta + sin5 theta = 0

sin theta +sin 2theta+sin3theta+sin4theta=0

sin2theta-sin4theta+sin6theta=0

If sin 6theta = sin 4theta - sin 2theta , then theta =

sin theta + sin 5 theta = sin 3theta (0 le theta le 2pi)

sin^(3)theta + sin theta - sin theta cos^(2)theta =

If : 0 lt theta lt pi/2 and sin 7theta + sin 4 theta + sin theta=0 , then : theta =

Prove that ( cos theta + cos 2 theta + cos 3 theta + cos 4 theta)/(sin theta + sin 2 theta + sin 3 theta + sin 4 theta)= cot ""(5theta)/(2).

If" " 0 < theta < pi/2, " then show that " sin theta sin 2 theta sin 3 theta le 9/16