She doesn't know how take a derivative? Use product rule
Hi
If you could, please help me solve any these problems (I believe a keyword is Derivative):
1] f ( x) =e^x cos x (0 <= x <= 2 pi)
sketch the graph of the function over the specified interval by obtaining the following info.
a) the intervals where f is increasing and where it is decreasing
b) the relative extrema of f
c) the concavity of f
d)the inflection points of f
2] find an equation of the tangent line to the graph of the function
f (x ) = e^secx at the point (pi/4, e^ squared root of 2)
3] determine the intervals where the function f (X ) e^x cos x (0 <= x <= 2 pi)
ty