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

Your problem has not been solved here? Please take a look at the  hot problems ！