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M表示x軸上方區域及x軸,即-360°≤x≤-180°,0°≤x≤180°,360°≤x≤540°,等等.N中-6,6應該是弧度制.1弧度約等於57.3°,6弧度約等於343.8°.所以N={x|-343.8°≤x≤343.8°}所以交集為{x|-343.8°≤x≤-180…
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