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

8-55.

What angle in the first quadrant could you reference to help you find the sine and cosine of each of the following angles? *7-56 HW eTool* (Desmos). Homework Help ✎

60°

Use the eTool below to find the needed reference angles.

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