There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ tan(\frac{x}{2} - \frac{pi}{4})\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = tan(\frac{1}{2}x - \frac{1}{4}pi)\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( tan(\frac{1}{2}x - \frac{1}{4}pi)\right)}{dx}\\=&sec^{2}(\frac{1}{2}x - \frac{1}{4}pi)(\frac{1}{2} + 0)\\=&\frac{sec^{2}(\frac{1}{2}x - \frac{1}{4}pi)}{2}\\ \end{split}\end{equation} \]

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