Question Number 20576 by gopikrishnan005@gmail.com last updated on 28/Aug/17
$${sec}\left({A}−\mathrm{3}\Pi/\mathrm{2}\right) \\ $$
Answered by Tinkutara last updated on 28/Aug/17
$$\mathrm{sec}\:\left(\frac{\mathrm{3}\pi}{\mathrm{2}}−{A}\right)=−\mathrm{cosec}\:{A} \\ $$