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看点一周期--重复的间隔例1已知A、B为函数的图像与直线y=(1/2)的两个交点(如图1),求ω及线段AB的长.解周期而AB的长恰好是一个周期,即AB=4π.
Look at a cycle - repeated intervals Example 1 Know that A, B is the function of the image and straight line y = (1/2) of the two intersections (Figure 1), find ω and line segment AB long. Solution cycle and The length of AB is exactly one cycle, ie AB=4π.