Answer
$\sqrt2$
Work Step by Step
Convert the angle measure to degrees to obtain:
$=\frac{\pi}{4} \cdot \frac{180^o}{\pi} = 45^o$
Thus,
$\csc{(\frac{\pi}{4})}
\\= \csc{45^o}$
From Section 2.1 (page 50) , we learned that:
$\csc{45^o} = \sqrt2$
