Найти tg(a), если
[tex] \frac{2 \sin( \alpha ) - \cos( \alpha ) }{ \sin( \alpha ) - 2 \cos( \alpha ) } = 3[/tex]
[tex] \frac{2 \sin( \alpha ) - \cos( \alpha ) }{ \sin( \alpha ) - 2 \cos( \alpha ) } = 3[/tex]
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на фото..................