इन समीकरण को हल कीजिये `sin 2theta +sin 4theta =cos theta +cos 3theta `

(sin 3theta)/(sin theta)-(cos 3theta)/(cos theta)=

Prove the following identities : (sin theta +sin 3 theta + sin 5 theta + sin 7theta)/(cos theta + cos 3 theta + cos 5 theta + cos 7 theta)=tan 4 theta

Prove that : (sin theta + sin 3theta + sin 5theta)/(cos theta + cos 3theta + cos 5theta) = tan 3theta

sin 7 theta * sin theta+sin11theta * sin 3theta= A) sin 4 theta * sin 10theta B) cos 4 theta * cos 10 theta C) sin 8 theta * sin 4 theta D) cos 8 theta * cos 14 theta

((cos theta - cos 3 theta ) ( sin 8 theta + sin 2 theta ))/(( sin 5 theta - sin theta )( cos 4 theta - cos 6 theta ))=

Prove that : (sin 5theta + sin 3theta)/(cos 5theta + cos 3theta) = tan 4theta

If sin theta + cos theta = a " then " sin^(4) theta + cos^(4) theta =

If sin theta _1+ sin theta _2+ sin theta _3=3 " then " cos theta _1 + cos theta _2 + cos theta_3 =