AIR MATH

Math Question

Which formula gives the \( x \)-coordinates of the maximum values for \( y=\cos (x) \) ? \( k \pi \) for any integer \( k \) \( k \pi \) for \( k=0, \pm 2, \pm 4, \ldots \) \( \frac{k \pi}{2} \) for any positive integer \( k \) \( \frac{k \pi}{2} \) for \( k=0, \pm 2, \pm 4, \ldots \)

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