Question

Solve : $\underset{x\to 0}{lim}si{n}^{-1}\left(\right(secx\left)\right)$ is equal to

Answer 1

${lim}_{x\to 0}si{n}^{-1}\left(secx\right)=si{n}^{-1}\left(sec0\right)$

$=si{n}^{-1}\left(1\right)$

$=\pi /2$