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%  Evaluating Trigonometric Functions       %
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\problemgrouptitle{Evaluating Trigonometric Functions}

\begin{problemblock}[2]{Find the exact values of the following trigonometric functions.  Check your results on your calculator.}

\addtoanswerkey{\begin{multicols}{2}}
\item $\sin(\pi/3)$
\answer{$\displaystyle\frac{\sqrt{3}}{2}$}

\item $\cos(135^\circ)$
\answer{$\displaystyle-\frac{1}{\sqrt{2}}$}

\item $\sin(5\pi/6)$
\answer{$\displaystyle\frac{1}{2}$}

\item $\cos(3\pi/2)$
\answer{$0$}

\item $\csc(7\pi/4)$
\answer{-$\sqrt{2}$}

\item $\cot(210^\circ)$
\answer{$\sqrt{3}$}

\item $\sec(\pi)$
\answer{$-1$}

\item $\tan(13\pi/4)$
\answer{$1$}

\addtoanswerkey{\end{multicols}}
\end{problemblock}
