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The coordinates of the point at which the line
\( \mathrm{P} \) \( x \cos \alpha+y \sin \alpha+a \sin \alpha \tan \alpha=0 \) touches the

W parabola \( y^{2}=4 a x \) are:
(1) \( (a \tan \alpha, 2 a \tan \alpha) \)
(2) \( (2 a \tan \alpha, a \tan \alpha) \)
(3) \( \left(a \tan ^{2} \alpha,-2 a \tan \alpha\right) \)
(4) \( (a \cos \alpha, 2 a \cos \alpha) \)
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