find-0-cosx-ch-2x-x-2-x-3-2-dx-

Question Number 133125 by abdomsup last updated on 19/Feb/21

f i n d \int_{0}^{\infty} \frac{c o s x c h (2 x)}{{(x^{2} + x + 3)}^{2}} d x

Commented by mathmax by abdo last updated on 20/Feb/21

the Q is find \int_{- \infty}^{+ \infty} \frac{cosxch (2 x)}{{(x^{2} + x + 3)}^{2}} dx