答案:x=-pi:0.1:pi; x1=-pi:0.01:-5*pi/8; x2=-3*pi/8:0.01:3*pi/8; x3=5*pi/8:0.01:pi; x4=-7*pi/8:0.01:-1*pi/8; x5=pi
其他:x=-pi:0.1:pi; x1=-pi:0.01:-5*pi/8; x2=-3*pi/8:0.01:3*pi/8; x3=5*pi/8:0.01:pi; x4=-7*pi/8:0.01:-1*pi/8; x5=pi
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