| 3 | ||
Oblicz wartości pozostałych funkcji trygonometrycznych wiedząc, że sin α = | i α jest | |
| 5 |
| sinα | 3 | 5 | 3 | |||||
tgα= | = | * | = | |||||
| cosα | 5 | 4 | 4 |
| 1 | 4 | |||
ctgα= | = | |||
| tgα | 3 |
2/ sposób:
bo z tw. Pitagorasa
| 3 | 3x | |||
sinα= | = | ... x >0
| ||
| 5 | 5x |
| 4x | 4 | |||
cosα= | = | |||
| 5x | 5 |
| 3x | 3 | |||
tgα= | = | |||
| 4x | 4 |
| 4x | 4 | |||
ctgα= | = | |||
| 3x | 3 |
