现以2016年宁波中考数学试题第26题压轴题为例,从不同的角度给出多种解法,一同体验数学解题的乐趣.试题呈现例(2016宁波)如图1,在平面直角坐标系中,O为坐标原点,点A的坐标为(5,0),菱形OABC的顶点B,C都在第一象限,tan∠AOC=4/3,将菱形绕点A按顺时针方向旋转α(0°<∠α< Now take the Ningbo 26th exam questions of Ningbo senior high school entrance examination questions in 2016 as an example, gives a variety of solutions from different angles, together experience the fun of solving math problems .Examples of questions (Ningbo) In Figure 1, Cartesian coordinate system , O is the coordinate origin, the coordinate of point A is (5,0), the vertices B, C of the diamond OABC are in the first quadrant, tan ∠ AOC = 4/3, and the diamond A is rotated in the clockwise direction by α (0 ° <∠α <