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यदि cottheta=7/8, तो (i)((1+sintheta)(1-...

यदि `cottheta=7/8,` तो `(i)((1+sintheta)(1-sintheta))/((1+costheta)(1-costheta))(ii)cot^(2)theta` का मान ज्ञात कीजिए।

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