Fonctions circulaires des arcs usuels
Pour obtenir une représentation graphique, cliquer sur les différentes valeurs des angles en radians.
\(\alpha~ (\textrm{radian})\) | \(0\) | \(\frac{\pi}{6}\) | \(\frac{\pi}{4}\) | \(\frac{\pi}{3}\) | \(\frac{\pi}{2}\) |
\(\alpha~ (\textrm{degr\'e})\) | \(0\) | \(30\) | \(45\) | \(60\) | \(90\) |
\(\sin \alpha\) | \(0\) | \(\frac{1}{2}\) | \(\frac{\sqrt{2}}{2}\) | \(\frac{\sqrt{3}}{2}\) | \(1\) |
\(\cos \alpha\) | \(1\) | \(\frac{\sqrt{3}}{2}\) | \(\frac{\sqrt{2}}{2}\) | \(\frac{1}{2}\) | \(0\) |
\(\tan \alpha\) | \(0\) | \(\frac{\sqrt{3}}{3}\) | \(1\) | \(\sqrt{3}\) | \(\infty\) |
\(\textrm{cotan } \alpha\) | \(\infty\) | \(\sqrt{3}\) | \(1\) | \(\frac{\sqrt{3}}{3}\) | \(0\) |