There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ 6xcos(6x) + sin(6x)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 6xcos(6x) + sin(6x)\right)}{dx}\\=&6cos(6x) + 6x*-sin(6x)*6 + cos(6x)*6\\=&12cos(6x) - 36xsin(6x)\\ \end{split}\end{equation} \]

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