How can I solve for sec 100° 0' 5" ?
sec(100+5/360)
$${sec}{\left({\mathtt{100}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{5}}}{{\mathtt{360}}}}\right)} = -{\mathtt{5.750\: \!864\: \!607\: \!877\: \!902\: \!7}}$$
sec(100° 0' 5") = 1 / cos(100° 0' 5")