There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ 5cos(x) + 5cos(5)x\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = 5cos(x) + 5xcos(5)\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 5cos(x) + 5xcos(5)\right)}{dx}\\=&5*-sin(x) + 5cos(5) + 5x*-sin(5)*0\\=&-5sin(x) + 5cos(5)\\ \end{split}\end{equation} \]

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