The graph looks like this, on the enclosed pic: One feature is that it's periodic and torn (has cut-off points), meaning the domain is the same as in case of tan(x): x€R and x =/= π/2+πn. The range equals the range of arcsin(x): -π/2<=y<=π/2 OR y€[-π/2;π/2] Hope could understand and if it helped! :)