1)tg x = -1
x/2 = -π/4 + πk
x = -π/2 + 2πk
2)-3π/5 < -π/2 + 2πk < 18π/5 |+π/2
-π/10 < 2πk < 41π/10|:2π
-1/20 < k < 41/20
-1/20 < k < 2 1/20
k = 0; 1; 2
3)x = -π/4
x = π-π/4 = 3π/4
x = 2π-π/4 = 7π/4
ответ: {-π/4; 3π/4; 7π/4}
1)tg x = -1
x/2 = -π/4 + πk
x = -π/2 + 2πk
2)-3π/5 < -π/2 + 2πk < 18π/5 |+π/2
-π/10 < 2πk < 41π/10|:2π
-1/20 < k < 41/20
-1/20 < k < 2 1/20
k = 0; 1; 2
3)x = -π/4
x = π-π/4 = 3π/4
x = 2π-π/4 = 7π/4
ответ: {-π/4; 3π/4; 7π/4}