本次共计算 1 个题目：每一题对 x 求 1 阶导数。
    注意，变量是区分大小写的。
\[ \begin{equation}\begin{split}【1/1】求函数-(\frac{1.5sin(x)}{cos(x)} - \frac{9.8*1.5*1.5}{(2({5.5261}^{2})({(cos(x))}^{2}))}) 关于 x 的 1 阶导数：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\解:&\\ &原函数 = \frac{-1.5sin(x)}{cos(x)} + \frac{0.361028194032306}{cos(x)cos(x)}\\&\color{blue}{函数的第 1 阶导数：}\\&\frac{d\left( \frac{-1.5sin(x)}{cos(x)} + \frac{0.361028194032306}{cos(x)cos(x)}\right)}{dx}\\=&\frac{-1.5cos(x)}{cos(x)} - \frac{1.5sin(x)sin(x)}{cos^{2}(x)} + \frac{0.361028194032306sin(x)}{cos^{2}(x)cos(x)} + \frac{0.361028194032306sin(x)}{cos(x)cos^{2}(x)}\\=&\frac{-1.5cos(x)}{cos(x)} - \frac{1.5sin(x)sin(x)}{cos^{2}(x)} + \frac{0.361028194032306sin(x)}{cos^{2}(x)cos(x)} + \frac{0.361028194032306sin(x)}{cos^{2}(x)cos(x)}\\ \end{split}\end{equation} \]

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