Question: A city planner is designing a periodic stormwater drainage system that follows a sinusoidal pattern over the year. The water level is modeled by $ w(t) = 7\sin\left(\frac\pi6t\right) + 24\cos\left(\frac\pi6t\right) $, where $ t $ is in months. What is the maximum water level, and when does it first occur? - go-checkin.com