If $\displaystyle \theta=\frac{{16}}{{3}}\pi$, then

$\displaystyle {\sin{{\left(\theta\right)}}}$ = Preview Question 6 Part 1 of 2  
$\displaystyle {\cos{{\left(\theta\right)}}}$ = Preview Question 6 Part 2 of 2  

Example: Enter sqrt(2)/2 for $\displaystyle$ $\displaystyle \frac{\sqrt{{{2}}}}{{2}}$. With functions like sqrt, be sure to use function notation (parentheses). sqrt(2)/2 will work, but sqrt2/2 will not.