| 1 | ||
3tg2 x − | = 5 | |
| cos2x |
| 1 | ||
3tg2x − | = 5 | |
| cos2x |
| 3sin2x | 1 | ||
− | = 5 | ||
| cos2x | cos2x |
| 3sin2x − 1 | |
= 5 | |
| cos2x |
| 3sin2x − 1 | |
= 5 sin2x = t, t ∊ <0,1> | |
| 1 − sin2x |
| sin2x | 1 | |||
3 | − | = 5 | ||
| cos2x | cos2x |
| 3sin2x−1 | |
= 5 | |
| cos2x |
| 3sin2x−1 | |
− 5 = 0 | |
| cos2x |
| 3sin2x−1 − 5cos2x | |
= 0 | |
| cos2x |
| 6 | ||
sin2x = | ||
| 8 |
| 3 | ||
sin2x = | ||
| 4 |
| √3 | √3 | |||
sinx = | lub sinx = − | |||
| 2 | 2 |