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[" (l) A + sin A "-1" conee "A+cot A" ,u...

[" (l) A + sin A "-1" conee "A+cot A" ,using the identity cosec' "A" a "],[hline" I t sin t "," is "]

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(cos A-sin A+1)/(cos A+sin A-1)=cosec A+cot A," using the identity cosec^(2)A=1+cot

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