What is the value of cos(90°)?

What is the value of cos(90°)?

Correct Answer: 0

Step 1: Understand that 'cos' refers to the cosine function, which is a trigonometric function.
Step 2: Know that angles can be measured in degrees, and 90° is a specific angle.
Step 3: Recall the unit circle, which helps us understand the values of trigonometric functions at different angles.
Step 4: Locate 90° on the unit circle. It is at the top of the circle, where the coordinates are (0, 1).
Step 5: The cosine of an angle is the x-coordinate of the point on the unit circle at that angle.
Step 6: Since the x-coordinate at 90° is 0, we find that cos(90°) = 0.

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