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6 दणब८ :5००८-1 _ 65809+0 पाई 310 U850 9.°09¢71 Oz कु §500—UIS ।

Answer»

(SinA+cosA)/(sina-cosa)+(sina-cosa)/(sina+cosa)=((Sina+cosa)^2)+((sina-cosa)^2)/((sina-cosa)(sina+cosa))=(Sin^2a+cos^2a+2sinacosa+sin^2a+cos^2a-2sinacosa)/(sin^2a-cos^2a)=2(sin^2a+cos^2a)/(sin^2a -cos^2a )=2/(sin^2a -cos^2a )



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