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" W.यदि "cot theta=(7)/(8)" तो (i) "((1+...

" W.यदि "cot theta=(7)/(8)" तो (i) "((1+sin theta)(1-sin theta))/((1+cos theta)(1-cos theta))" (ii) "cot^(2)theta" का मान ज्ञात करें "

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(sin theta)/(1-cos theta)=cos ec theta+cot theta