| −5−1 | −3 | |||
t1 = | = | ∊ nie należy <−1,1> | ||
| 2 | 2 |
| π | ||
x=− | + 2kπ | |
| 2 |
| −5−1 | 3 | |||
t1 = | =−6/4=− | |||
| 4 | 2 |
| −5+1 | ||
t2 = | =−1 | |
| 4 |
1 − 2 sin2 x − 5 sin x − 4 = 0
2 sin2 x + 5 sin x + 3 = 0
2 t2 + 5 t + 3 = 0
Δ = 25 − 24 = 1
| − 5 − 1 | ||
t = | = − 1,5 | |
| 4 |
| − 5 + 1 | ||
t = | = 1 | |
| 4 |
| π | ||
x = − | + 2π*k , k − dowolna liczba całkowita | |
| 2 |
| − b − √Δ | ||
x1 = | ||
| 2 a |
| − b + √Δ | ||
x2 = | ||
| 2 a |