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What is the value of cos(0°)?

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Question: What is the value of cos(0°)?

Options:

  1. 0
  2. 1
  3. -1
  4. undefined

Correct Answer: 1

Solution: 

cos(0°) = 1.

What is the value of cos(0°)?

Practice Questions

Q1
What is the value of cos(0°)?
  1. 0
  2. 1
  3. -1
  4. undefined

Questions & Step-by-Step Solutions

What is the value of cos(0°)?
  • Step 1: Understand that 'cos' refers to the cosine function, which is a trigonometric function.
  • Step 2: Know that the angle given is 0 degrees.
  • Step 3: Recall the definition of cosine for an angle in a right triangle or on the unit circle.
  • Step 4: For 0 degrees, the cosine value is defined as the x-coordinate of the point on the unit circle.
  • Step 5: At 0 degrees, the point on the unit circle is (1, 0).
  • Step 6: Therefore, the x-coordinate is 1.
  • Step 7: Conclude that cos(0°) = 1.
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