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

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?

1. $330^\circ$

$30^\circ$

1. $120^\circ$

60°

1. $113^\circ$

1. $203^\circ$

Use the eTool below to find the needed reference angles.
Click the link to the right for the full version: CCA2 7-56 HW eTool
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