1) tgx=1 2) tgx=-1 3) tgx=0 4) tgx=-2 5) tg^2x-6tgx+5=0 6) tg^2x-2tgx-3=0

1) tgx = 1

x = π/4 + πn, n∈Z

2) tgx = - 1

x = - π/4 + πn, n∈Z

3) tgx = 0

x = πk, k∈Z

4) tgx = - 2

x = arctg (-2) + πk, k∈Z

x = - arctg (2) + πk, k∈z

5) tg^2x - 6tgx + 5 = 0

a) tgx = 1

x1 = π/4 + πn, n∈Z

b) tgx = 5

x2 = arctg (5) + πk, k∈z

6) tg^2x - 2tgx - 3 = 0

a) tgx = - 1

x1 = - π/4 + πn, n∈Z

b) tgx = 3

x2 = arctg (3) + πk, k∈z