To find the value of \( \sin 60^\circ \), we can use the fact that \( \sin \theta = \cos(90^\circ - \theta) \).
For \( \theta = 60^\circ \): \[ \sin 60^\circ = \cos(90^\circ - 60^\circ) = \cos 30^\circ \]
Therefore, the correct response would be: \[ \sin 60^\circ = \cos 30^\circ \]
So the answer is: sine 60 degrees is equal to cosine 30 degrees.