# La trigonométrieFormulaire

 cos(x) sin(x) x (radians) x (degrés) 0 $$\displaystyle{\dfrac{\pi}{6}}$$ $$\displaystyle{\dfrac{\pi}{4}}$$ $$\displaystyle{\dfrac{\pi}{3}}$$ $$\displaystyle{\dfrac{\pi}{2}}$$ $$\displaystyle{\pi}$$ $$\displaystyle{\dfrac{3\pi}{2}}$$ $$\displaystyle{2\pi}$$ 0 30 45 60 90 180 270 360 1 $$\displaystyle{\dfrac{\sqrt{3}}{2}}$$ $$\displaystyle{\dfrac{\sqrt{2}}{2}}$$ $$\displaystyle{\dfrac{1}{2}}$$ 0 −1 0 1 0 $$\displaystyle{\dfrac{1}{2}}$$ $$\displaystyle{\dfrac{\sqrt{2}}{2}}$$ $$\displaystyle{\dfrac{\sqrt{3}}{2}}$$ 1 0 −1 0

Pour tout réel $$\displaystyle{x}$$ : $$\displaystyle{sin^{2}x+cos^{2}x=1}$$