| 4 | y | |||
tg α = | = | |||
| 3 | x |
| y | 4 | |||
sin α = | = | |||
| r | 5 |
| x | 3 | |||
cos α = | = | |||
| r | 5 |
| 8 | ||
sin α + cos α = | ||
| 5 |
sinα + cosα = ...
I OP I = r
P = ( x, y)= ( 3, 4)
| sin(α) | 4 | ||
= | |||
| cos(α) | 3 |
| sin2(α) | 16 | ||
= | |||
| cos2(α) | 9 |
| 1−cos2(α) | 16 | ||
= | |||
| cos2(α) | 9 |
| 1 | 16 | ||
−1= | |||
| cos2(α) | 9 |
| 1 | 25 | ||
= | |||
| cos2(α) | 9 |
| 9 | ||
cos2(α)= | ||
| 25 |
| 16 | ||
1−cos2(α)= | ||
| 25 |
| 3 | ||
cos(α)= | ||
| 5 |
| 4 | ||
sin(α)= | ||
| 5 |
| 8 | 7 | |||
Janek | a nie | ? | ||
| 5 | 5 |
| 7 | ||
Oczywiście | . Pewnie nie trafiłem w klawisz  | |
| 5 |