Tg^2x=-1/2 и tg^2x=3

Question

Tg^2x=-1/2 и tg^2x=3

Answer 1

2x=-arctg(1\2)+пn, n∈Z
x=-arctg(1\2)\2 + пn\2, n∈Z

2x=arctg(3) + пn, n∈Z
x = arctg(3)\2 + пn\2, n∈Z