tan (a )=1.45 (Ill assume a is in degrees)
arctan 1.45=a arctan is the same as inverse tan.
I will enter it as atan(1.45)
$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{tan}}^{\!\!\mathtt{-1}}{\left({\mathtt{1.45}}\right)} = {\mathtt{55.407\: \!711\: \!312\: \!49^{\circ}}}$$
tan (a )=1.45 (Ill assume a is in degrees)
arctan 1.45=a arctan is the same as inverse tan.
I will enter it as atan(1.45)
$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{tan}}^{\!\!\mathtt{-1}}{\left({\mathtt{1.45}}\right)} = {\mathtt{55.407\: \!711\: \!312\: \!49^{\circ}}}$$