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

9-53.

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

A positive cosine and a negative sine.

A sine of

. A negative cosine and a negative sine.

A cosine of approximately

and a sine of approximately . Can an angle have a sine of

and cosine of ? Give an example or explain why not.

Use the eTool below to explore these ideas.

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