This subsection is not completed yet, but in the meantime here are some practice questions.

Remember:

\begin{align*}
\frac{\dif }{\dif x}\sin x &= \cos x\\
\frac{\dif }{\dif x} \cos x &= -\sin x\\
\frac{\dif }{\dif x} \tan x &= \sec^2 x
\end{align*}