(Solved): Use the (x,y) coordinates in the figure to find the value of the trigonometric function at the indi ...

Use the $(x,y)$ coordinates in the figure to find the value of the trigonometric function at the indicated real number, $t$, or state that the expression is undefined. $\sin \pi$ Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. $\sin \pi =$ (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.) B. The expression is undefined.