| π | ||
sin(4x)=sin(5x+ | ) | |
| 2 |
| π | ||
4x+2kπ=5x+ | ||
| 2 |
| −π | ||
x= | +2kπ, k∊ℤ | |
| 2 |
| π | ||
A 4x+2kπ=5x− | ) ? | |
| 2 |
| 1234π | ||
sin(x)=sin( | ) | |
| 5678 |
| 1234π | ||
x+2kπ= | ||
| 5678 |
| 1234π | ||
x= | +2kπ | |
| 5678 |
| π | ||
cos(5x) = cos( | − 4x) | |
| 2 |
| π | π | |||
5x = | − 4x + k • 2π ∨ 5x = − | + 4x + k • 2π | ||
| 2 | 2 |
| π | 2 | π | ||||
x = | + k • | π ∨ x = − | + k • 2π | |||
| 18 | 9 | 2 |