Question

ctg x + 4/ctg x +5=0

Answer 1

ctg x + 4/ctg x +5=0
ctg²x+5ctgx+4=0
sinx<>0
x<>πN
ctgx=-1
x=-arcctg1+πK
x=-π/4+πK
ctgx=-4
x=-arcctg4+πK