Differentiate the following functions with respect to x:
e3x cos(2x)
Let y = e3xcos(2x)
On differentiating y with respect to x, we get
Recall that (uv)’ = vu’ + uv’ (product rule)
We know
and
[chain rule]
We have 
Thus, 
21
Differentiate the following functions with respect to x:
e3x cos(2x)
Let y = e3xcos(2x)
On differentiating y with respect to x, we get
Recall that (uv)’ = vu’ + uv’ (product rule)
We know and
[chain rule]
We have
Thus,