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

A

`tan^(-1)(9)`

B

`(pi)/(2)-tan^(-1)(9)`

C

`(pi)/(2)+tan^(-1)(9)`

D

none of these

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The correct Answer is:
B, C
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