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[int(dx)/(2+cos x)=],[[2tan^(-1)((1)/(sq...

[int(dx)/(2+cos x)=],[[2tan^(-1)((1)/(sqrt(3))tan(x)/(2))+c," (b) "(2)/(sqrt(3))tan^(-1)((1)/(sqrt(3))tan(x)/(2))+],[" (a) "(1)/(sqrt(3))tan^(-1)((1)/(sqrt(3))tan(x)/(2))+c," (d) None of these "]]

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If 3 tan ^(-1)((1)/(2+sqrt(3)))-tan ^(-1) (1)/(x)=tan ^(-1) (1)/(3) then x=

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