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o 1 (के 0w= (909500~ 100+ |) (9 998 +QUEL+]) (1) I‘ |
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Answer» (1+cot A-cosec A).(1+tanA+secA)= 2 L.H.S. =(1+cosA/sinA-1/sinA).(1+sinA/cosA+1/cosA) =(sinA+cosA-1)×(cosA+sinA+1)/sinA.cosA =[(sinA+cosA)^2-(1)^2]/sinA.cosA. =(sin^2A+cos^2A+2.sinA.cosA-1)/sinA.cosA. =( 1+2.sinA.cosA -1)/sinA.cosA. = 2.sinA.cosA/sinA.cosA = 2 , proved. |
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