There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ \frac{9.81(1 - cos(2*3.14*5x))}{(2*3.14*5)}\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = - 0.312420382165605cos(31.4x) + 0.312420382165605\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( - 0.312420382165605cos(31.4x) + 0.312420382165605\right)}{dx}\\=& - 0.312420382165605*-sin(31.4x)*31.4 + 0\\=& - -9.81sin(31.4x)\\ \end{split}\end{equation} \]

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