Упростите выражение:
[tex] \frac{ \cos(\pi - \alpha ) \times \tan(\pi + \alpha ) } { \sin( \frac{ \pi }{2} - \alpha ) } [/tex]
[tex] \frac{ \sin(\pi - \alpha ) - \cos( \frac{\pi}{2} + \alpha ) }{ \cos(\pi + \alpha ) } [/tex]
[tex] \frac{ \cos(\pi - \alpha ) \times \tan(\pi + \alpha ) } { \sin( \frac{ \pi }{2} - \alpha ) } [/tex]
[tex] \frac{ \sin(\pi - \alpha ) - \cos( \frac{\pi}{2} + \alpha ) }{ \cos(\pi + \alpha ) } [/tex]
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