There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ 6 + 2cos(x)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = 2cos(x) + 6\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 2cos(x) + 6\right)}{dx}\\=&2*-sin(x) + 0\\=& - 2sin(x)\\ \end{split}\end{equation} \]

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