+118723 asec is the same as inverse sec
asec(3/2) = acos(2/3)
on the web 2 calc you can enter it as asec without changing it anyway
$${asec}{\left({\frac{{\mathtt{3}}}{{\mathtt{2}}}}\right)} = {\mathtt{48.189\: \!685\: \!104\: \!221^{\circ}}}$$
$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{cos}}^{\!\!\mathtt{-1}}{\left({\frac{{\mathtt{2}}}{{\mathtt{3}}}}\right)} = {\mathtt{48.189\: \!685\: \!104\: \!221^{\circ}}}$$
+118723 asec is the same as inverse sec
asec(3/2) = acos(2/3)
on the web 2 calc you can enter it as asec without changing it anyway
$${asec}{\left({\frac{{\mathtt{3}}}{{\mathtt{2}}}}\right)} = {\mathtt{48.189\: \!685\: \!104\: \!221^{\circ}}}$$
$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{cos}}^{\!\!\mathtt{-1}}{\left({\frac{{\mathtt{2}}}{{\mathtt{3}}}}\right)} = {\mathtt{48.189\: \!685\: \!104\: \!221^{\circ}}}$$
