There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ 0.524cos(2π*0.2x) + 0.873\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 0.524cos(0.4πx) + 0.873\right)}{dx}\\=&0.524*-sin(0.4πx)*0.4π + 0\\=&-0.2096πsin(0.4πx)\\ \end{split}\end{equation} \]

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