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Evaluate. Write your answer in simplified, rationalized form. Do not round.\newlinecos⁡90∘=\cos 90^\circ = ____

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Full solution

Q. Evaluate. Write your answer in simplified, rationalized form. Do not round.\newlinecos⁡90∘=\cos 90^\circ = ____
  1. Recall cosine values: Recall the value of cosine for standard angles.\newlineThe value of cos⁡(90°)\cos(90°) is a well-known trigonometric fact. The cosine of 9090 degrees is 00.

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