| sinx | |
= 1 − √2 | |
| cosx |
| cosx − sinx | |
= √2 | |
| cosx |
| π | ||
√2sin( | − x) = √2cosx | |
| 4 |
| π | π | |||
sin( | − x) = sin( | − x) | ||
| 4 | 2 |
| π | π | π | π | ||||
− x = | − x + 2kπ v | − x = | + x − 2kπ | ||||
| 4 | 2 | 4 | 2 |
| π | π | ||
− x = | + x − 2kπ | ||
| 4 | 2 |
| π | ||
2x = − | + 2kπ | |
| 4 |
| π | ||
x = − | + kπ , k ∊ C | |
| 8 |
| π | ||
x≠ | +kπ | |
| 2 |
| 2tgx | ||
tg(2x)= | ||
| 1−tg2x |
| 2*(1−√2) | ||
tg(2x)= | ||
| 1−(1−√2)2 |