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सिद्ध कीजिए कि `(sinA)/(1+cosA)+(1+cosA)/(sinA)=2cosecA.`

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बायाँ पक्ष `(sinA)/(1+cosA)+(1+cosA)/(sinA)=(sinA+(1+cosA)^(2))/(sinA(1+cosA))`
`=(sin^(2)A+1+cos^(2)A+2cosA)/(sinA(1+cosA))=(sin^(2)A+cos^(2)A+1+2cosA)/(sinA(1+cosA))`
`=(2+2cosA)/(sinA(1+cosA))=(2(1+cosA))/(sinA(1+cosA))`
`=(2)/(sinA)=2cosecA=`दायाँ पक्ष|

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