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[" Q.5.If "tan(alpha)/(2)=m," then the v...

[" Q.5.If "tan(alpha)/(2)=m," then the value of "(1-2sin^(2)(alpha/2))/(1+sin alpha)" is "],[[" (A) "(2m)/(1+m)," (B) "(1-m)/(1+m)," (C) "(1+m)/(1-m)," (D) "(1+m)/(2m)]]

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