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If cos^(-1)=x a and sin^(-1) (2x sqrt(1-...

If `cos^(-1)=x a and sin^(-1) (2x sqrt(1-x^(2)))+sec^(-1) ((1)/(2x^(2)-1))=(2pi)/(3)`
`0 lt x lt (1)/( sqrt(2))` then find `tan^(-1)(2x)` in degrees)

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