Answer
a. Graph the trigonometric function, and find the point on the graph which has coordinates (t,y), where y is the y-coordinate. The value of the trigonometric function at real number t is y.
b. $\frac{1}{2}$
Work Step by Step
a. Finding value of trig function given an x-value is just like finding a value of any other function.
b. $sin(\frac{5\pi}{6})$ = $sin(\pi-\frac{5\pi}{6})$ = $sin(\frac{\pi}{6})$ = sin(30) = $\frac{1}{2}$.
