# Theorems on Limiting Contours

If a and b are real and positive, show that

cos(ax)/(b+x) dx = (xe^-abx)/(1 + x^2) dx

which of these would be easier to calculate numerically and why? (See Hildebrand, Advanced Calculus for Applications, 2nd Ed., p. 612, #98 for a similar problem and some hints.)

© BrainMass Inc. brainmass.com October 9, 2019, 9:02 pm ad1c9bdddfhttps://brainmass.com/math/calculus-and-analysis/theorems-on-limiting-contours-170623

#### Solution Summary

This solution looks at theorems on limiting contours in an attached Word document.

$2.19