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9-53.
  1. Sketch a unit circle. In your unit circle, sketch an angle that has: 9-53 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 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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