[tex]2 tg^{2} ( \frac{ \pi }{2} + \alpha ) \\ sin ^{2} ( \alpha - \frac{5 \pi }{2} )+4cos ^{2} ( \alpha + \frac{3 \pi }{2} ) \\ cos(2( \alpha + \frac{ \pi }{2} )sin( \alpha + \frac{7 \pi }{2} ) [/tex]
если cos=0,2
если cos=0,2
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