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| 1. |
1-cos θ .1 + cos θ8.6 R)(cosec θ-cot θ)' =1.os A 1+sin A 2secA1 +sin A cos Atan θ(iii) 1-cotcot θtan θ1+ sec Asec Asin2 A1 - cos Acos Asin A+ 1=cosec A +cot A |
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