Root 1-cos A/1+cos A =1/ cosec+ cot A
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√(1- cosA)/(1+cosA )×(1 -cosA)/(1-cosA)
√(1-cosA)²/1-cos²A
1-cos/sinA
cosecA+cotA×(cosecA-cotA)/(cosecA+cotA)
1/cosecA+cotA
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