TrigonometryMediumGraphs of Sine and Cosine ShareGraphs of Sine and Cosine · Medium problemWhat is the minimum value of y=4cos(12x−π2)−3y = 4\cos\left(\dfrac{1}{2}x - \dfrac{\pi}{2}\right) - 3y=4cos(21x−2π)−3?Check Show answer Walk through it step by step Practice more like this Review this concept