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

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