### Home > A2C > Chapter 8 > Lesson 8.1.4 > Problem8-55

8-55.
1. What angle in the first quadrant could you reference to help you find the sine and cosine of each of the following angles? 8-55 HW eTool (Desmos). Homework Help ✎

1. 330°

2. 120°

3. 113°

4. 203°

30°

60°

Use the eTool below to find the needed reference angles.
Click the link to the right for full version: A2C 8-55 HW eTool