Question

Ctg4x+1=0 решите плиз!

Answer 1

ctg4x=-1
$4x=arcctg(-1)+pi*k$
$4x= frac{3pi}{4} +pi*k$
$x= frac{3pi}{16} + frac{pi*k}{4}$
$x= frac{3pi+4pi*k}{16}$