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Find the number of solutions of `(x ,\ y)` which satisfy `|y|=cosx\ a n d\ y=sin^(-1)(sinx),\ w h e r e\ |x|lt=3pi`.

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ALLEN-INVERSE TRIGONOMETRIC FUNCTIONS-All Questions
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  18. Solve the equation : 2 tan^(-1) ( 2x - 1) = cos ^(-1) x .

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  19. solve sin^(-1) (sin 5) gt x^(2) - 4x

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  20. The complete solution set of the inequality [cot^(-)x]^(2)-6[cot^(-1)x...

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