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What is the value of sin(90°)?

Practice Questions

Q1
What is the value of sin(90°)?
  1. 0
  2. 1
  3. √2
  4. √3

Questions & Step-by-Step Solutions

What is the value of sin(90°)?
Correct Answer: 1
  • Step 1: Understand what 'sin' means. 'Sin' is short for 'sine', which is a function in trigonometry that relates to angles in a right triangle.
  • Step 2: Know that '90°' is a specific angle. It represents a right angle.
  • Step 3: Recall the unit circle, which is a circle with a radius of 1. The angle of 90° corresponds to the top point of the circle.
  • Step 4: At 90°, the coordinates on the unit circle are (0, 1). The sine of an angle is the y-coordinate of that point.
  • Step 5: Since the y-coordinate at 90° is 1, we can say that sin(90°) = 1.
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