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What is the value of sin 90° × cos 90°?

Question: What is the value of sin 90° × cos 90°?
  • A. -1
  • B. O ✓
  • C. Undefined
  • D. (–1)
Correct Answer: B. O
Explanation: sin 90° = 1, cos 90° = 0, so 1×0 = 0.

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