The exercise asks me to construct an appropriate triangle to complete the table. ($\displaystyle 0deg \leq \theta \leq 90deg$,$\displaystyle 0 \leq \theta \leq \frac{\pi}{2}$)

Function $\displaystyle \theta$(deg) $\displaystyle \theta$(rad) Function Value sec $\displaystyle \frac{\pi}{4}$

I'm just drawing an absolute blank on how I would do this even though I feel it shouldn't be that hard. I think I'm suffering from information overload a little.