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(sin3theta)/(1+2cos2theta)...

`(sin3theta)/(1+2cos2theta)`

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Prove that sin theta=(sin3 theta)/(1+2cos2 theta) and hence deduce the value of sin15^(@)

(sin3 theta)/(1+2cos2 theta)

Prove that (sin 3 theta)/(1+2cos2 theta)=sin theta and hence find sin15^(@)

Prove that (sin 3 theta)/(1+2cos2 theta)=sin theta and hence find sin15^(@)

Prove that sin (3theta)/(1+2cos 2theta)=sin theta .

If (3sin2theta)/(1-cos2theta)=1/2 and 0^(@)letheta180^(@) , then theta =

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

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