$$\begin{array}{l}u＝罪\theta \mathrm{因为}\varphi \\ v＝罪\theta 罪\varphi \end{array}$$

$$\begin{array}{l}u＝\mathrm{因为}el罪\mathrm{一个}z\\ v＝罪el\end{array}$$

$$\begin{array}{l}-1\le u\le 1\\ -1\le v\le 1\\ u^2+v^2\le 1\end{array}$$

$$\begin{array}{l}\mathrm{棕褐色的}\varphi ＝v/u\\ 罪\theta ＝\sqrt{u^2+v^2}\end{array}$$

$$\begin{array}{l}罪el＝v\\ \mathrm{棕褐色的}\mathrm{一个}z＝\frac{u}{\sqrt{1-u^2-v^2}}\end{array}$$

$$\begin{array}{l}罪el＝罪\varphi 罪\theta \\ \mathrm{棕褐色的}\mathrm{一个}z＝\mathrm{因为}\varphi \mathrm{棕褐色的}\theta \\ \mathrm{因为}\theta ＝\mathrm{因为}el\mathrm{因为}\mathrm{一个}z\\ \mathrm{棕褐色的}\varphi ＝\mathrm{棕褐色的}el/罪\mathrm{一个}z\end{array}$$