Z góry dziękuję
a) sinα*sinβ=?
| √6 | ||
sinα+sinβ= | /2 | |
| 2 |
| 6 | b | |||
sin2α+2sinαsinβ+sin2β= | [sinβ= | =cosα patrz na Δ] | ||
| 4 | c |
| 3 | 3 | |||
sin2α+2sinαsinβ+cos2α= | ⇔2sinαsinβ= | −1 | ||
| 2 | 2 |
| √6 | √6 | |||
sinα+sinβ= | ⇔cosβ+cosα= | |||
| 2 | 2 |
| 6 | ||
sin2α+2sinα*sinβ+sin2β= | ||
| 4 |
| 1 | ||
sinα*sinβ= | ||
| 4 |