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Home > A2C > Chapter 8 > Lesson 8.1.4 > Problem 8-64
8-64.
Sketch a unit circle. In your circle, sketch in an angle that has:
A positive cosine and a negative sine.
A sine of
. A negative cosine and a negative sine.
A cosine of about
and a sine of about . Could an angle have a sine equal to
and cosine equal to ? Give an angle or explain why not.
Use the eTool below to explore these ideas.
Click the link at right for the full version of the eTool: 8-64 HW eTool