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What is the value of sin(90° - x)?

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Question: What is the value of sin(90° - x)?

Options:

  1. cos(x)
  2. sin(x)
  3. tan(x)
  4. sec(x)

Correct Answer: cos(x)

Solution: 

Using the co-function identity, sin(90° - x) = cos(x).

What is the value of sin(90° - x)?

Practice Questions

Q1
What is the value of sin(90° - x)?
  1. cos(x)
  2. sin(x)
  3. tan(x)
  4. sec(x)

Questions & Step-by-Step Solutions

What is the value of sin(90° - x)?
  • Step 1: Understand that sin(90° - x) is a trigonometric function.
  • Step 2: Learn about the co-function identity, which states that sin(90° - x) equals cos(x).
  • Step 3: Apply the co-function identity to rewrite sin(90° - x) as cos(x).
  • Step 4: Conclude that the value of sin(90° - x) is equal to cos(x).
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