The expression, \[ \begin{array}{r} \frac{\tan \left(\frac{3 \pi}{2}-\alpha\right) \cos \left(\f....

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The expression,
\( \mathrm{P} \)
\[
\begin{array}{r}
\frac{\tan \left(\frac{3 \pi}{2}-\alpha\right) \cos \left(\frac{3 \pi}{2}-\alpha\right)}{\cos (2 \pi-\alpha)}+\cos \left(\alpha-\frac{\pi}{2}\right) \sin (\pi-\alpha) \\
+\cos (\pi+\alpha) \sin \left(\alpha-\frac{\pi}{2}\right), \alpha \neq \frac{n \pi}{2}, n \in I,
\end{array}
\]
when simplified reduces to
(1) 0
(2) 1
(3) -1
(4) 2


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