π | ||
sin(4x)−cos(4x)=−√2cos( | +4x) | |
4 |
π | π | |||
−√2cos( | +4x)=−√2cos( | +x) / : (−√2) | ||
4 | 4 |
π | π | |||
cos( | +4x)=cos( | +x) | ||
4 | 4 |
π | π | ||
+4x= | +x+2kπ k∊C | ||
4 | 4 |
π | π | |||
4x−x= | − | +2kπ | ||
4 | 4 |
2 | ||
x= | kπ i k∊C | |
3 |
π | π | ||
+4x=−( | +x)+2kπ i k∊C | ||
4 | 4 |
π | ||
4x+x=−2 | +2kπ | |
4 |
1 | ||
5x=− | π+2kπ | |
2 |
1 | 2 | |||
x=− | π+ | kπ i k∊C | ||
10 | 5 |