| arctgx | ||
∫ | dx | |
| x2 |
| arctgx | 1 | 1 | ||||
∫ | dx = − | arctgx + ∫ | dx | |||
| x2 | x | x(1+x2) |
| arctgx | 1 | 1+x2−x2 | ||||
∫ | dx = − | arctgx + ∫ | dx | |||
| x2 | x | x(1+x2) |
| arctgx | 1 | 1 | 1 | 2x | ||||||
∫ | dx = − | arctgx +∫ | dx − | ∫ | dx | |||||
| x2 | x | x | 2 | 1+x2 |
| arctgx | 1 | 1 | ||||
∫ | dx = − | arctgx +ln|x| − | ln|x2+1|+C | |||
| x2 | x | 2 |
| arctgx | 1 | 1 | x2 | |||||
∫ | dx = − | arctgx + | ln| | |+C | ||||
| x2 | x | 2 | x2+1 |