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The angle between y^(2)=4x and x^(2)+y^(...

The angle between `y^(2)=4x` and `x^(2)+y^(2)=12` at a point of their intersection is

A

`tan^(-1)sqrt(2)`

B

`tan^(-1)2`

C

`tan^(-1)2sqrt(2)`

D

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

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