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The sum of all the solutions of equation's cos^-1x - 2sin^-1 x = cos^-12x

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The sum of all the solutions of equation's cos-1x - 2sin-1 x = cos-12x

(1) 1 

(2) \(\frac12\)

(3) \(-\frac12\)

(4) 0

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1 Answer

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Best answer

Correct option is (4) 0

sum of all solutions = 0

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