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If sin 30° = 0.5, what is the cosine of its complement?

Mathematics
NECO 2002

If sin 30° = 0.5, what is the cosine of its complement?

  • A. -0.866
  • B. -0.5
  • C. 0.5
  • D. 0.866
  • E. 1
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Correct Answer: Option C
Explanation

To find the cosine of the complement of \(30^\circ\), we first calculate the complement:

\(90^\circ - 30^\circ = 60^\circ\)

Next, we need to find \( \cos 60^\circ \). The known trigonometric value is:

\(\cos 60^\circ = 0.5\)

Therefore, the cosine of the complement of \(30^\circ\) is: 0.5


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