доказательство неравенств
[tex] \cos( \sin(x) ) > 0 \\ \sin(2 + \cos(x) ) > 0 \\ \cos(\pi + arc \sin(x) ) \leqslant 0[/tex]
[tex] \cos( \sin(x) ) > 0 \\ \sin(2 + \cos(x) ) > 0 \\ \cos(\pi + arc \sin(x) ) \leqslant 0[/tex]
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