There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ 9{x}^{2} + cos(\frac{1}{2})x + 2csc(4)x\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = xcos(\frac{1}{2}) + 2xcsc(4) + 9x^{2}\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( xcos(\frac{1}{2}) + 2xcsc(4) + 9x^{2}\right)}{dx}\\=&cos(\frac{1}{2}) + x*-sin(\frac{1}{2})*0 + 2csc(4) + 2x*-csc(4)cot(4)*0 + 9*2x\\=&cos(\frac{1}{2}) + 2csc(4) + 18x\\ \end{split}\end{equation} \]

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