π | ||
2sin(2x+π)<√2 i x∊(−π, | ) | |
2 |
√2 | ||
sin(2x+π)< | ||
2 |
5π | π | |||
− | +2kπ<2x+π< | +2kπ /−π | ||
4 | 4 |
9π | 3π | |||
− | +2kπ<2x<− | +2kπ /:2 | ||
4 | 4 |
9π | 3π | |||
− | +kπ<x<− | +kπ | ||
8 | 8 |
9π | 3π | π | ||||
− | <x<− | i x∊(−π, | ) | |||
8 | 8 | 2 |
3π | ||
x∊(−π,− | ) | |
8 |
9π | 3π | |||
− | +π<x<− | +π | ||
8 | 8 |
π | 5π | π | ||||
− | <x< | i x∊(−π, | )⇔ | |||
8 | 8 | 2 |
π | 4π | π | ||||
− | <x< | = | ||||
8 | 8 | 2 |