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例1某人下午6时多外出,看到表上两指针的夹角为110°,下午7时前回家发现两指针的夹角仍是110°,求这个人在外的时间.常规解法先求当6时多时,指针夹角为110°的时刻.假设为6时x分,则
Example 1 Someone went out more than 6 pm in the afternoon and saw the included angle of the two hands on the table as 110°. Before returning home at 7 pm, the angle between the two hands was still 110°. Ask the person for the time outside. The conventional solution first. To find the time when the angle between the hands is 110° for a long time at 6 o’clock