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Angle of intersection of the curves y = ...

Angle of intersection of the curves `y = 4-x^(2)` and `y = x^(2)` is

A

`pi/2`

B

`tan^-1 4/3`

C

` tan^(-1) (4sqrt(2) )/7`

D

`tan^-1 3/4`

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The correct Answer is:
C
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