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Using the above graph, if 10º < x < 60º, what is the value of x...

Mathematics
WAEC 1989

Using the above graph, if 10º < x < 60º, what is the value of x for which sin x = cos x?

  • A. 0o
  • B. 20o
  • C. 30o
  • D. 45o
  • E. 50o
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Correct Answer: Option D
Explanation

From the graph; when sin x = cos x

x = 45º

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