| 1 | |
− sinx*tgx = −1/3 | |
| cosx |
| 1 | sin2x | ||
− | = −1/3 | ||
| cosx | cosx |
| cos2x | |
= − 1/3 | |
| cosx |
| 3 | ||
1= | sinα−cosα | |
| 2 |
| 3 | ||
−1=cosα− | sinα | |
| 2 |
| 9 | 13 | |||
1+ | = | |||
| 4 | 4 |
| √13 | 2 | 3 | ||||
−1= | ( | cosα− | sinα) | |||
| 2 | √13 | √13 |
| 2 | ||
− | =cos(α+φ) | |
| √13 |
| 2 | ||
π−arccos( | )=α+φ | |
| √13 |
| 2 | ||
φ=arccos( | ) | |
| √13 |
| 2 | 2 | |||
π−arccos( | )=α+arccos( | ) | ||
| √13 | √13 |
| 2 | ||
α=π − 2arccos( | ) | |
| √13 |
| π | 2 | |||
α = 2( | − arccos( | )) | ||
| 2 | √13 |
| 2√13 | ||
α = 2arcsin( | ) | |
| 13 |
| 5^2 | 52 |
| 2^{10} | 210 |
| a_2 | a2 |
| a_{25} | a25 |
| p{2} | √2 |
| p{81} | √81 |
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