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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