1 1
/ /
| |
| cos(x) | cos(x)
| ------ dx = | ------ dx
| 1 + x | 1 + x
| |
/ /
0 0
$${{\left(i\,\sin 1+\cos 1\right)\,{\it expintegral\_e}\left(1 , i
\right)+\left(\cos 1-i\,\sin 1\right)\,{\it expintegral\_e}\left(1
, -i\right)}\over{2}}-{{\left(i\,\sin 1+\cos 1\right)\,
{\it expintegral\_e}\left(1 , 2\,i\right)+\left(\cos 1-i\,\sin 1
\right)\,{\it expintegral\_e}\left(1 , -2\,i\right)}\over{2}}$$
Ответ (Неопределённый)
[src] / /
| |
| cos(x) | cos(x)
| ------ dx = C + | ------ dx
| 1 + x | 1 + x
| |
/ /
$$-{{\left(i\,\sin 1+\cos 1\right)\,{\it expintegral\_e}\left(1 , i\,
x+i\right)+\left(\cos 1-i\,\sin 1\right)\,{\it expintegral\_e}\left(
1 , -i\,x-i\right)}\over{2}}$$