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Home > A2C > Chapter 8 > Lesson 8.1.3 > Problem 8-38


Each of the points on the graph below represents the position of a rider on The Screamer. Draw a diagram of each rider’s position on a unit circle and describe where the rider is located.

Sine graph, x axis labeled theta, scaled in 45 degrees, from 0 to 360 degrees, starting at the origin, rising to (90, comma 1), falling to (270, comma negative 1), rising to (360, comma 0). Points on graph, labeled as follows: just past 90 degree, A, half way between 180 & 215, B at 360, C.

Draw a unit circle. Notice that point A is slightly past 90°. Where is that on the unit circle?

Circle, center at the origin, with highest point on the y axis, labeled, 90 degrees.

To locate point B, determine how the graph in the problem is scaled.