### Home > INT3 > Chapter 10 > Lesson 10.2.1 > Problem 10-107

10-107.

Use reference angles, the unit circle, and the fact that

Draw a unit circle diagram for the given angle.**Unit circle, with right triangle in first quadrant, labeled as follows: hypotenuse, 1, horizontal leg, 1 half, angle opposite vertical leg, pi thirds.**

Reflect the triangle in each of the 4 quadrants. Quadrant 2 is shown for you. **Added to the unit circle, a right triangle in second quadrant, labeled as follows: hypotenuse, 1, horizontal leg, negative 1 half.**