Question

помогите
2tgx+5ctgx-11=0

Answer 1

Решение во вложении.

Answer 2

$2tgx+ frac{5}{tgx} -11=0 2 tg^{2}-11tgx +5=0 tgx=a 2 a^{2} -11a+5=0 a1= 1/2 a2=5 x1=arctg 1/2+ pi n x2=arctg5+ pi n$