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# Improper Integrals Involving Trigonometric Functions - 2

SVCALC-LIXXRA

Evaluate the improper integral:

$$\int_{-\infty}^\infty \frac{1}{9+16x^2}dx$$

A

$\cfrac{\pi}{24}$

B

$-\cfrac{\pi}{12}$

C

$\cfrac{\pi}{6}$

D

$\cfrac{\pi}{12}$

E

infinite integral