| π | π | |||
Dlaczego arccos | = | ? | ||
| 3 | 3 |
| π | π | ||
>1, zatem | nie należy do dziedziny arcusa cosinusa. | ||
| 3 | 3 |
| 1 | π | π | 1 | |||||
arccos | = | , bo cos | = | . | ||||
| 2 | 3 | 3 | 2 |
| π | ||
Dziękuję  to jak w takim razie będzie z arccos(cos(− | )) ? | |
| 3 |
| π | 1 | π | ||||
arccos(cos(− | ))=arccos( | )= | ||||
| 3 | 2 | 3 |
| π | π | π | ||||
arccos(cos(− | ))=arccos(cos( | ))= | ||||
| 3 | 3 | 3 |
| π | ||
bo np. gdyby tam było cos(− | ) to byśmy już mieli problem | |
| 80 |