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