| 2 | ||
Kąt alfa jest ósmy, a cos alfa = | Oblicz 2sin2alfa − tg alfa | |
| 5 |
| 2 | ||
cosα= | ||
| 5 |
| 2 | 21 | √21 | ||||
sinα=√1−( | )2= √ | = | ||||
| 5 | 25 | 5 |
| sinα | √21 | 5 | √21 | |||||
tgα= | = | * | = | |||||
| cosα | 5 | 2 | 2 |
| 21 | √21 | 42 | √21 | |||||
2sin2α−tgα= 2* | − | = | − | = | ||||
| 25 | 2 | 25 | 2 |
| 84−25√21 | ||
= | ||
| 50 |
| 5^2 | 52 |
| 2^{10} | 210 |
| a_2 | a2 |
| a_{25} | a25 |
| p{2} | √2 |
| p{81} | √81 |
| Kliknij po więcej przykładów | |
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