| 1 | ||
kat α jest ostry i zachodzi cos α = | . Wowczas tg α jest rowny? | |
| 3 |
x = ...
tgα = x
| 1 | ||
sinα+( | )2=1 | |
| 3 |
| 1 | ||
sin2α+ | =1 | |
| 9 |
| 1 | ||
sinα=1− | ||
| 9 |
| 8 | ||
sinα= | ||
| 9 |
| √8 | √8 | |||
sinα= | lub sinα=− | |||
| 3 | 3 |
| √8 | ||
sinα<900 (kąt ostry w tresci zadania ) czyli sinα= | ||
| 3 |
| sinα | √8 | 1 | ||||
tgα= | = | : | =U{√8{3}*3=√8=√2*4=2 √2 | |||
| cosα | 3 | 3 |
| 1 | √3 | |||
a)2 b) | c)2√3 d) | |||
| 2 | 6 |