February 2019 0 39 Report
Zad. 17
Jeśli cos \alpha =- \frac{1}{5} i  \alpha jest kątem rozwartym, to wartość tg \alpha jest równa:
A. - \frac{ \sqrt{6} }{12}
B.  \frac{ \sqrt{6} }{12}
C. -2√6
D. 2√6
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