The angle formed by the positive y - axi...

The angle formed by the positive `y - axis` and the tangent to `y=x^2+4x-17 at (5/2,-3/4)` is: (a) `tan^(-1)(9)` (b) `pi/2-tan^(-1)(9)` `pi/2+tan^(-1)(9)` (d) none of these

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