arctan(0.155)

$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{tan}}^{\!\!\mathtt{-1}}{\left({\mathtt{0.155}}\right)} = {\mathtt{8.810\: \!732\: \!985\: \!985^{\circ}}}$$

.