( tg x + 4 ) ( tg x/2 - 1 ) = 0;
tgx + 4 = 0 или tg x/2 - 1 = 0;
tgx = -4;
x = arctg(-4) + pin, n ∈ Z;
х = -arctg4 + pin, n ∈ Z;
tg x/2 = 1;
x/2 = pi/4 + pin, n ∈ Z;
x = 2pi/4 + 2pin, n ∈ Z;
x = pi/2 + 2pin, n ∈ Z.
ответ: arctg4 + pin, n ∈ Z;
pi/2 + 2pin, n ∈ Z.
