2
pi
-1 - --- + pi*Si(pi)
2
$$- \frac{\pi^{2}}{2} - 1 + \pi \operatorname{Si}{\left(\pi \right)}$$
2
pi
-1 - --- + pi*Si(pi)
2
$$- \frac{\pi^{2}}{2} - 1 + \pi \operatorname{Si}{\left(\pi \right)}$$
Ответ (Неопределённый)
[src] /
|
| /pi\ /pi\ /pi\
| cos|--| dx = C + pi*Si|--| + x*cos|--|
| \x / \x / \x /
|
/
$$\int \cos{\left(\frac{\pi}{x} \right)}\, dx = C + x \cos{\left(\frac{\pi}{x} \right)} + \pi \operatorname{Si}{\left(\frac{\pi}{x} \right)}$$