| √2 | ||
sin3x + cos3x = √2 / * | ||
| 2 |
| π | ||
sin(3x + | ) = 1 | |
| 4 |
| π | π | |||
3x + | = | + k * 2π | ||
| 4 | 2 |
| π | ||
3x = | + k * 2π | |
| 4 |
| π | 2 | |||
x = | + k * | π ∧ k ∊ C. | ||
| 12 | 3 |
| π | ||
sin(3x+ | )=1 | |
| 4 |
| √2 | √2 | √2 * √2 | ||||
sin3x * | + | * cos3x = | ||||
| 2 | 2 | 2 |
| π | π | 2 | ||||
sin3x * cos | + sin | * cos3x = | ||||
| 4 | 4 | 2 |
| π | ||
sin(3x + | = 1. | |
| 4 |