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

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