| 19 | 5 | π | 2 | |||||
cos( − | π) − cos ( − | π) = cos (3π + | ) − cos (π + | π) = | ||||
| 6 | 3 | 6 | 3 |
| π | 2 | π | 2 | |||||
= cos ( π + | ) − ( − cos | π ) = − cos | + cos | π = | ||||
| 6 | 3 | 6 | 3 |
| √3 | √3 | |||
= − | − | = −√3 | ||
| 2 | 2 |
| 5 | 3 | 2 | 2 | 2 | |||||
π = ( | + | )π = ( 1 + | )π = π + | π | |||||
| 3 | 3 | 3 | 3 | 3 |
| 5^2 | 52 |
| 2^{10} | 210 |
| a_2 | a2 |
| a_{25} | a25 |
| p{2} | √2 |
| p{81} | √81 |
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