A continuación vamos a escribir una tabla con las razones trigonométricas de los ángulos que nos tenemos que saber:
| Ángulo grados | Ángulo radianes | Seno | Coseno | Tangente |
| $0^\circ$ | $0\,rad$ | $0$ | $1$ | $0$ |
| $30^\circ$ | $\dfrac{\pi}{6}\,rad$ | $\dfrac{1}{2}$ | $\dfrac{\sqrt{3}}{2}$ | $\dfrac{\sqrt{3}}{3}$ |
| $45^\circ$ | $\dfrac{\pi}{4}\,rad$ | $\dfrac{\sqrt{2}}{2}$ | $\dfrac{\sqrt{2}}{2}$ | $1$ |
| $60^\circ$ | $\dfrac{\pi}{3}\,rad$ | $\dfrac{\sqrt{3}}{2}$ | $\dfrac{1}{2}$ | $\sqrt{3}$ |
| $90^\circ$ | $\dfrac{\pi}{2}\,rad$ | $1$ | $0$ | $\infty$ |
| $180^\circ$ | $\pi\,rad$ | $0$ | $-1$ | $0$ |
| $270^\circ$ | $\dfrac{3\pi}{2}\,rad$ | $-1$ | $0$ | $-\infty$ |
| $360^\circ$ | $2\pi\,rad$ | $0$ | $1$ | $0$ |