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

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