The angle of intersection between the curves P \( x^{2}=4(y+1) \) a...

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The angle of intersection between the curves
P \( x^{2}=4(y+1) \) and \( x^{2}=-4(y+1) \) is:

W
(1) \( \frac{\pi}{6} \)
(2) \( \frac{\pi}{4} \)
(3) 0
(4) \( \frac{\pi}{2} \)
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