There are 1 questions in this calculation: for each question, the 4 derivative of π is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ 4th\ derivative\ of\ function\ cos(q)rtπ\ with\ respect\ to\ π：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = rtπcos(q)\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( rtπcos(q)\right)}{dπ}\\=&rtcos(q) + rtπ*-sin(q)*0\\=&rtcos(q)\\\\ &\color{blue}{The\ second\ derivative\ of\ function:} \\&\frac{d\left( rtcos(q)\right)}{dπ}\\=&rt*-sin(q)*0\\\\ &\color{blue}{The\ third\ derivative\ of\ function:} \\&\frac{d\left( 0\right)}{dπ}\\=&0\\\\ &\color{blue}{The\ 4th\ derivative\ of\ function:} \\&\frac{d\left( 0\right)}{dπ}\\=&0\\ \end{split}\end{equation} \]

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