December 2018 1 20 Report
Jesli tg alfa=1/3 i alfa jest miara kata ostrego to:
sin alfa= \frac{ \sqrt{10} }{10}
sin alfa = -\frac{ \sqrt{10} }{10}
cos alfa \frac{ \sqrt{10} }{10}
cos alfa - \frac{ \sqrt{10} }{10}

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