| sin | cos | tg | cotg | |
| 0 | 0 | 1 | 0 | ∞ |
| π/12=15° | (√(2-√3))/2 = (√6 - √2)/4 | (√(2+√3))/2 = (√6 + √2)/4 | 2 - √3 | 2 + √3 |
| π/10=18° | (√5-1)/4 | (√(10+2√5))/4 | √(1 - 2/√5) | √(5+2√5) |
| π/8=22°30' | (√(2-√2))/2 | (√(2+√2))/2 | √2 - 1 | √2 + 1 |
| π/6=30° | 1/2 | √3/2 | √3/3 | √3 |
| π/5=36° | (√(10-2√5))/4 | (√5+1)/4 | √(5 - 2√5) | √(1 + 2/√5) |
| π/4=45° | √2/2 | √2/2 | 1 | 1 |
Les valeurs entre 45° et 180° sont déjà dans la table par les formules :
cos(π/2-a) = sin(a), sin(π/2-a) = cos(a), tg(π/2-a) = 1/tg(a) = cotg(a)
cos(π/2+a) = -sin(a), sin(π/2+a) = cos(a), tg(π/2+a) = -1/tg(a) = -cotg(a)
cos(π-a) = -cos(a), sin(π-a) = sin(a), tg(π-a) = -tg(a)