Step 1: Understanding the Concept:
In SHM, kinetic energy and potential energy vary with time and are complementary to each other.
Step 2: Detailed Explanation:
Given \(KE = k_0 \cos^2 \omega t\). When kinetic energy is maximum, \(\cos^2 \omega t = 1\), so \(KE = k_0\).
At this instant, displacement is zero, so potential energy becomes zero.
Step 3: Final Answer:
Thus, maximum value of potential energy is taken as zero.