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Cosec A/Cosec A -1 + Cosec A / Cosec A +1 = 2 sec ^ 2A prove lhs = rhsclass 10 I need answer fast |
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Answer» Step-by-step EXPLANATION: COSECA/cosecA+1+ cosecA/cosec A-1 by cross multiplication cosecA(cosecA+1)+cosecA(cosecA-1) /cosec^2A-1 as, cosec^2A-1=cot^2A 2 cosec^2A/cot^2A 2/sin^A . sin^2A/cos^2A ( as by BRINGING cot to the numerator it get reversed) 2/cos^2A (1/cos^2A=sec^2A) =2sec^2A |
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