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The actue angle between the tangent at t...

The actue angle between the tangent at those points on the curve `y=(x+1)(x-3)` where it meets the X-axes is

A

`tan ^(-1)((15)/(8))`

B

`tan ^(-1) ((8)/(15))`

C

`(pi)/(4)`

D

`(pi)/(2)`

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The correct Answer is:
B
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