Problema 4

Să se calculeze $l=\displaystyle\lim_{x\to\pi}\dfrac{\int_0^{\sin x} e^{t^2}\,dt}{\int_0^{\operatorname{tg} x} e^{t^2}\,dt}$.

a) $l=0$; b) $l=\infty$; c) $l=-1$; d) $l=1$; e) $l=-\infty$; f) $l=2$.