Простейшие тригонометрические уравнения
| 1.sin t= a, |a| ≤ 1
| t = (-1)narcsin a + πn, n ε Z
| | Частные случаи:
| sin t= 0
t= πn, n ε Z
| sin t= 1
t=π/2+2 πn, n ε Z
| sin t= -1
t=-π/2+2 πn, n ε Z
| | a
| -1
| -√3
| -√2
| -1
|
| 1
| √2
| √3
|
| | arcsin a
| -π
| -π
| -π
| -π
|
| π
| π
| π
| π
| | | 2. cos t = a, |a| ≤ 1
| t = ± arccos a + 2πn, n ε Z
| | Частные случаи:
| cos t= 0
t= π/2+ πn, n ε Z
| cos t= 1
t=2 πn, n ε Z
| cos t= -1
t=π+2 πn, n ε Z
| | a
| -1
| -√3
| -√2
| -1
|
| 1
| √2
| √3
|
| | arcсоs a
| π
| 5π
| 3π
| 2π
| π
| π
| π
| π
|
|
| | 3. tg t = a, -∞ < a < ∞
| t = arctg a + πn, n ε Z
| | Частные случаи:
| tg t = 0
t= πn, n ε Z
| tg t = 1
t=π/4+ πn, n ε Z
| tg t = -1
t=-π/4+πn, n ε Z
| | a
| -√3
| -1
| -√3
|
| √3
|
| √3
| | arctg a
| -π
| -π
| -π
|
| π
| π
| π
|
| | 4. ctg t = a, -∞ < a < ∞
| t = arcctg a + πn, n ε Z
| | Частные случаи:
| ctg t = 0
t= π/2+ πn, n ε Z
| ctg t = 1
t=π/4+ πn, n ε Z
| ctg t = -1
t=3π/4+πn, n ε Z
| | a
| -√3
| -1
| -√3
|
| √3
|
| √3
| | arcсtg a
| 5π
| 3π
| 2π
| π
| π
| π
| π
| | | | | | | | |
Простейшие тригонометрические неравенства
| sint < a, |a|< 1
| π- arcsina +2 πn < t <2 π+arcsin a +2 πn, n ε Z
| | | sint ≤ a, |a|< 1
| π- arcsina +2 πn ≤ t ≤ 2π+arcsin a +2 πn, n ε Z
| | | sint > a, |a|< 1
| arcsina +2 πn < t < π- arcsin a +2 πn, n ε Z
| | | sint ≥ a, |a|< 1
| arcsina +2 πn ≤ t ≤ π- arcsin a +2 πn, n ε Z
| | a
| -1
| -√3
| -√2
| -1
|
| 1
| √2
| √3
|
| arcsin a
| -π
| -π
| -π
| -π
|
| π
| π
| π
| π
| | | | cos t < a, |a|< 1
| arccosa +2 πn < t <2π -arccosa +2 πn, n ε Z
| | | cos t ≤ a, |a|< 1
| arccosa +2 πn ≤ t ≤ 2π -arccosa +2 πn, n ε Z
| | | cos t> a, |a|< 1
| -arccosa +2 πn < t < arccosa +2 πn, n ε Z
| | | cos t ≥ a, |a|< 1
| -arccosa +2 πn ≤ t ≤ arccosa +2 πn, n ε Z
| | | | | a
| -1
| -√3
| -√2
| -1
|
| 1
| √2
| √3
|
| | arcсоs a
| π
| 5π
| 3π
| 2π
| π
| π
| π
| π
|
| | | | tg t < a
| -π/2+ πn < t < arctg a + πn, n ε Z
| | | tg t ≤ a
| -π/2+ πn < t ≤ arctg a + πn, n ε Z
| | | tg t > a
| arctg a + πn < t < π/2+ πn, n ε Z
| | | tg t ≥ a
| arctg a + πn ≤ t < π/2+ πn, n ε Z
| a + πn, n ε Z
| | | | a
| -√3
| -1
| -√3
|
| √3
|
| √3
| | arctg a
| -π
| -π
| -π
|
| π
| π
| π
| | | | сtg t < a
| arсctg a + πn < t < π+ πn, n ε Z
| | | сtg t ≤ a
| arсctg a + πn ≤ t < π+ πn, n ε Z
| | | сtg t > a
| πn < t < arсctg a + πn, n ε Z
| | | сtg t ≥ a
| πn < t ≤ arсctg a + πn, n ε Z
| | | | | | | | |
|