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What is the value of cos(180°)?
What is the value of cos(180°)?
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What is the value of cos(180°)?
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cos(180°) = -1.
Questions & Step-by-step Solutions
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Q: What is the value of cos(180°)?
Solution:
cos(180°) = -1.
Steps: 5
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Step 1: Understand that cos(θ) is the cosine function, which is a trigonometric function.
Step 2: Know that the angle 180° is located on the negative x-axis in the unit circle.
Step 3: Recall that on the unit circle, the coordinates of the point at 180° are (-1, 0).
Step 4: The cosine of an angle is equal to the x-coordinate of the corresponding point on the unit circle.
Step 5: Since the x-coordinate at 180° is -1, we conclude that cos(180°) = -1.
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