| π | ||
sinα = cos( | − α) | |
| 2 |
| π | 3 | |||
cos( | − x + | π) = cos(3x − π) | ||
| 2 | 4 |
| 5 | ||
cos( | π − x) = cos(3x − π) | |
| 4 |
| 5 | 5 | ||
π − x = 3x − π + k*2π lub | π − x = −3x + π + k*2π, k∊C | ||
| 4 | 4 |
| 9 | −1 | 1 | 1 | |||||
−4x = − | π + k*2π / * | lub 2x = − | π + k*2π / * | |||||
| 4 | 4 | 4 | 2 |
| 9 | 1 | 1 | ||||
x = | − k* | π lub x = − | π + k*π | |||
| 16 | 2 | 8 |