| πx | ||
to jest tg( | ) ? | |
| 2 |
| (1−x)2 | 2(1−x) | |||
= lim | = lim | = | ||
| cos2(πx/2) | −2cos(πx/2)(sin(π/x)*(π/2) |
| x−1 | 1 | 2 | ||||
= lim | = lim | = | ||||
| sin(πx)*(π/2) | cos(πx)*(π/2) | π |
| 2x − 2 | 2 | 4 | ||||
drobna poprawka .. = lim | = | = | ||||
| sin(πx)(π/2) | cos(πx)(π/2) | π |
| 4 | ||
i jeszcze mi krowa zjadła minus  ... = − | ||
| π |