### Home > INT3 > Chapter 9 > Lesson 9.1.4 > Problem9-53

9-53.

Sketch a unit circle. In your unit circle, sketch an angle that has:

1. A positive cosine and a negative sine.

2. A sine of $–1$.

3. A negative cosine and a negative sine.

4. A cosine of approximately $–0.9$ and a sine of approximately $0.4$.

5. Can an angle have a sine of $0.9$ and cosine of $0.8$? Give an example or explain why not.

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Click the link at right for the full version of the eTool: INT3 9-53 HW eTool