+118723 tan^-1 (6/4) =
Inverse tan is the same as arc tan 
I will enter it into the calc as
atan(6/4)
$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{tan}}^{\!\!\mathtt{-1}}{\left({\frac{{\mathtt{6}}}{{\mathtt{4}}}}\right)} = {\mathtt{56.309\: \!932\: \!474\: \!02^{\circ}}}$$
+118723 tan^-1 (6/4) =
Inverse tan is the same as arc tan
I will enter it into the calc as
atan(6/4)
$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{tan}}^{\!\!\mathtt{-1}}{\left({\frac{{\mathtt{6}}}{{\mathtt{4}}}}\right)} = {\mathtt{56.309\: \!932\: \!474\: \!02^{\circ}}}$$
