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सिद्ध कीजिए `(sin theta)/(cot theta+cosec theta)=2+(sin theta)/(cot theta-cosec theta).` |
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Answer» यहाँ `(sin theta)/(cot theta+cosec theta)=2+(sin theta)/(cot theta-cosec theta).` `implies(sin theta)/(cot theta+cosec theta)-(sin theta)/(cot theta-cosec theta)=2` अब `L.H.S. =(sin theta)/(cot theta+cosec theta)-(sin theta)/(cot theta-cosec theta)=(sin theta)/(cottheta+cosec theta)+(sin theta)/(cosec theta-cot theta)` `=sin theta{(1)/(cosec theta+cot theta)+(1)/(cosec theta-cot theta)}` `=sin theta{(cosectheta-cot theta+cosec theta+cot theta)/(cosec ^(2)-cot^(2)theta)}` `=sin theta(2 cosectheta)=2=R.H.S.` |
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