TrigonometryEasyGraphs of Sine and Cosine ShareGraphs of Sine and Cosine · Easy problemGive the equation of the midline of y=−sin(12x−π2)y = -\sin\left(\dfrac{1}{2}x - \dfrac{\pi}{2}\right)y=−sin(21x−2π).Check Show answer Walk through it step by step Practice more like this Review this concept