tg²x - 1 = 0
tg²x = 1
tgx = ±1
x = arctg(±1)
x = π/4 + πk, 3π/4 + πk, 5π/4 + πk, 7π/4 + πk, где k - целое число.
tg²x - 1 = 0
tg²x = 1
tgx = ±1
x = arctg(±1)
x = π/4 + πk, 3π/4 + πk, 5π/4 + πk, 7π/4 + πk, где k - целое число.