Question

3ctg$frac{x}{3}$-3=0

Answer 1

3ctg(x/3)=3
ctg(x/3)=1
x/3=pi/4+pi*n
x=0,75pi+3рi*n
n- любое целое

Answer 2

3ctg(x/3)-3=0
ctg(x/3)=1
x/3=π/4+πk
x=3π/4+3πk,k∈z