| x | ||
cos4x= sin | ||
| 2 |
| x | ||
cos(4x) = sin( | ) | |
| 2 |
| π | x | |||
cos(4x) = cos( | − | ) | ||
| 2 | 2 |
| π | x | |||
cos4x= cos | − | |||
| 2 | 2 |
| π | x | |||
4x= | − | |||
| 2 | 2 |
| π | π | |||
x= | + 2kπ V x= − | + 2kπ | ||
| 7 | 7 |
| x | ||
cos4x=sin | ||
| 2 |
| π | x | |||
cos4x=cos( | − | ) /: cos | ||
| 2 | 2 |
| π | x | |||
4x= | − | /*2 | ||
| 2 | 2 |
| π | ||
x= | ||
| 9 |
| π | π | |||
x= | + 2kπ v x= − | + 2kπ | ||
| 9 | 9 |
| 5^2 | 52 |
| 2^{10} | 210 |
| a_2 | a2 |
| a_{25} | a25 |
| p{2} | √2 |
| p{81} | √81 |
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