There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ ln(tan(7x))\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( ln(tan(7x))\right)}{dx}\\=&\frac{sec^{2}(7x)(7)}{(tan(7x))}\\=&\frac{7sec^{2}(7x)}{tan(7x)}\\ \end{split}\end{equation} \]

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