January 2019 1 19 Report
Skorzystaj z zależności
sin^{2} \alpha + cos^{2} \alpha =1 i wyznacz wartości pozostałych funkcji trygonometrycznych:
a)sin \alpha = \frac{2}{7} 90\ \textless \ \alpha \ \textless \ 180
b)cos \alpha = -\frac{1}{3} 180\ \textless \ \alpha \ \textless \ 270
c)tg \alpha = -2 90\ \textless \ \alpha \ \textless \ 180

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