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" 38.यदि "cot theta=(7)/(8)," ती "(1)((1...

" 38.यदि "cot theta=(7)/(8)," ती "(1)((1+sin theta)(1-sin theta))/((1+cos theta)(1-cos theta))" (ii) "cot^(2)theta" का मान जात कीजिए। "

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