Funkcja trygonometryczna

[alanowakk]

Oblicz wartości funkcji trygonometrycznych kąta \(x= \frac{-11 \pi }{6} \)

[jjjjjj]

\( \sin (\frac{-11\pi}{6}) = \sin (\frac{\pi}{6})= \frac{1}{2} \\
\cos (\frac{-11\pi}{6}) = \cos (\frac{\pi}{6})= \frac{ \sqrt{3} }{2}\\
\tg (\frac{-11\pi}{6}) = \frac{\sin (\frac{-11\pi}{6})}{\cos (\frac{-11\pi}{6})}= \frac{ \sqrt{3} }{3}\\
\ctg (\frac{-11\pi}{6})= \frac{1}{\tg (\frac{-11\pi}{6})}= \sqrt{3} \)