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Prove that : (sintheta)/(1+costheta)+(1+...

Prove that : `(sintheta)/(1+costheta)+(1+costheta)/(sintheta)=2"cosec"theta`

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i) Prove that: (cot^(2)A)/(1-"cosec"A)^(2)=(1+sinA)/(1-sinA) ii) Prove that: (costheta)/(1-tantheta)+(sintheta)/(1-cottheta)=sintheta+costheta

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