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The number of values of x for which sin...

The number of values of x for which `sin^(-1)(x^(2)-(x^(4))/3+(x^(6))/9………)+cos^(-1)(x^(4)-(x^(8))/3+(x^(12))/9………)=(pi)/2`, where `0le|x|ltsqrt(3)`, is

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