| 1 | ||
cos5x > | x∊<−π,π> | |
| 2 |
| π | π | |||
cos | + 2kπ = 1/2 lub cos− | + 2kπ = 1/2 gdzie k ∊ Z | ||
| 3 | 3 |
| π | π | |||
5x = | + 2kπ lub 5x = − | + 2kπ | ||
| 3 | 3 |
| π | 2 | π | 2 | |||||
x = | + | kπ lub x = − | + | kπ | ||||
| 15 | 5 | 15 | 5 |
| π | 2 | π | 2 | |||||
x ∊ ( − | + | kπ , | + | kπ ) .. trzeba wypisac pare tych przedziałów | ||||
| 15 | 5 | 15 | 5 |