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## 编译环境
操作系统
* [ ] Windows 7/8/10
* [ ] macOS
* [ ] Linux
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Tex发行版
* [ ] TexLive `年份`
* [ ] MikTeX `版本号`
* [ ] CTeX
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## 我的问题
```
\begin{align}
&D_{\alpha \beta \gamma}=\left[\begin{array}{lll}
D_{11} & D_{12} & D_{13} \\
D_{21} & D_{22} & D_{23} \\
D_{31} & D_{32} & D_{33}
\end{array}\right] =
\left[\begin{array}{l}
\cos \beta \cos \gamma \\
\cos \beta \sin \gamma \\
-\sin \beta
\end{array}\right.\\
&\mathrel{\phantom{=}}
\left.\begin{array}{ll}
-\cos \alpha \sin \gamma+\sin \alpha \sin \beta \cos \gamma & \sin \alpha \sin \gamma+\cos \alpha \sin \beta \cos \gamma \\
\cos \alpha \cos \gamma+\sin \alpha \sin \beta \sin \gamma & -\sin \alpha \cos \gamma+\cos \alpha \sin \beta \sin \gamma \\
\sin \alpha \cos \beta & \cos \alpha \cos \beta
\end{array}\right]
\end{align}
```
4 回答
0
```
\begin{equation}
\begin{aligned}
...
\end{aligned}
\end{equation}
```
0
参考一下：[https://tex.stackexchange.com/questions/277001/split-a-multiline-bmatrix](https://tex.stackexchange.com/questions/277001/split-a-multiline-bmatrix)
bing/google：latex math matrix split
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