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[" 50.Prove that "],[qquad cos^(-1)(x)+c...

[" 50.Prove that "],[qquad cos^(-1)(x)+cos^(-1){(x)/(2)+(sqrt(3-3x^(2)))/(2)}=(pi)/(3)],[" Allindia "2014c]

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Prove that cos^(-1)(x)+ cos^(-1){(x)/(2)+sqrt(3-3x^(2))/(2)}=(pi)/(3) .

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