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If y= (cos^-1 x)^2, prove that: (1 - x^2...

If `y= (cos^-1 x)^2`, prove that: `(1 - x^2 ) ((d^2y)/dx^2) - x(dy/dx) -2 = 0`.

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The correct Answer is:
`(1- x)^2 (d^2y)/(dx^2) - x(dy)/(dx) - 2 = 0`
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