Question no* 12 help me guys
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Answer:(cosecA-cotA)11
= (1/sinA-cos A/sinA)1
= ((1-cosA)²/sin²A
= (1-cosA)²/1-cos²A
= (1-cosA)(1-cos A) /(1-cos A)(1+ cosA)
= 1- cos A/ 1+ cos A
Hence proved
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