Recall that $\displaystyle \kappa{\left({t}\right)}$ is defined as the x-coordinate of the point on which you land when you walk along the unit square a distance $\displaystyle {t}$ (starting at (1,0) and taking positive direction as counterclockwise). Likewise, we define $\displaystyle \sigma{\left({t}\right)}$ as the corresponding y-coordinate. (See your class notes for clarification.)

Evaluate these functional expression:
$\displaystyle \kappa{\left({6.8}\right)}=$
$\displaystyle \sigma{\left({6.8}\right)}=$