There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ \frac{cos(x)x}{sin(3)}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = \frac{xcos(x)}{sin(3)}\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( \frac{xcos(x)}{sin(3)}\right)}{dx}\\=&\frac{cos(x)}{sin(3)} + \frac{x*-cos(3)*0cos(x)}{sin^{2}(3)} + \frac{x*-sin(x)}{sin(3)}\\=&\frac{cos(x)}{sin(3)} - \frac{xsin(x)}{sin(3)}\\ \end{split}\end{equation} \]

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