常用三角函数值表

写成矩阵形式

$$sin\left[\begin{array}{ccccc}{0}^{\circ }& 30^{\circ }& 45^{\circ }& 60^{\circ }& 90^{\circ }\end{array}\right]=\frac{\sqrt{\left[\begin{array}{ccccc}0& 1& 2& 3& 4\end{array}\right]}}{2}$$ $$cos\left[\begin{array}{ccccc}{0}^{\circ }& 30^{\circ }& 45^{\circ }& 60^{\circ }& 90^{\circ }\end{array}\right]=\frac{\sqrt{\left[\begin{array}{ccccc}4& 3& 2& 1& 0\end{array}\right]}}{2}$$ $$tan\left[\begin{array}{ccccc}{0}^{\circ }& 30^{\circ }& 45^{\circ }& 60^{\circ }& 90^{\circ }\end{array}\right]=\frac{\sqrt{\left[\begin{array}{ccccc}0& 3& 9& 27& \infty \end{array}\right]}}{3}$$

tan = tangent 正切
cotx = cotangent 余切
secx = secant 正割
cscx = coscant 余割