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Home > A2C > Chapter 8 > Lesson 8.1.4 > Problem 8-64

  1. Sketch a unit circle. In your circle, sketch in an angle that has: 8-64 HW eTool (Desmos). Homework Help ✎

    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 about −0.9 and a sine of about 0.4.

    5. Could an angle have a sine equal to 0.9 and cosine equal to 0.8? Give an angle or explain why not.

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