There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ sin(9 - 4x) + tan(8 - 4x)\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = sin(-4x + 9) + tan(-4x + 8)\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( sin(-4x + 9) + tan(-4x + 8)\right)}{dx}\\=&cos(-4x + 9)(-4 + 0) + sec^{2}(-4x + 8)(-4 + 0)\\=&-4cos(-4x + 9) - 4sec^{2}(-4x + 8)\\ \end{split}\end{equation} \]

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