=14(cos30+2cos5 theta+cos70)/(cos theta+2cos30+cos delta theta)=cos20-sin2 theta tan3 theta

(cos3 theta+2cos5 theta+cos7 theta)/(cos theta+2cos3 theta+cos5 theta)=cos2 theta-sin2 theta tan3 theta

Prove that (cos3 theta+2cos5 theta+cos7 theta)/(cos theta+2cos3 theta+cos5 theta)=cos2 theta-sin2 theta tan3 theta

What is the value of [(cos 3 theta + 2cos 5 theta+ cos 7 theta)/(cos theta + 2cos 3 theta + cos 5 theta)] + sin 2 theta tan 3 theta ? [(cos 3 theta + 2cos 5 theta+ cos 7 theta)/(cos theta + 2cos 3 theta + cos 5 theta)] + sin 2 theta tan 3 theta का मान क्या है?

Prove (cos 3theta+ 2 cos 5theta+ cos 7theta)/( cos theta+ 2 cos 3theta+ cos 5theta)= cos 2theta- sin 2theta tan 3theta .

cos theta+sin theta=cos2 theta+sin2 theta

(sin theta+sin3 theta+sin5 theta)/(cos theta+cos3 theta+cos5 theta)=tan3 theta

(1+sin2 theta-cos2 theta)/(1+sin2 theta+cos2 theta)=tan theta

2(cos theta+cos2 theta)+(1+2cos theta)sin2 theta=2sin 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

(sin^(2) theta)/(1-cos theta)-(cos^(2) theta)/(1-sin theta)=cos theta-sin theta