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钟面分针与时针不停地旋转,1小时分针旋转360°,时针旋转30°,分针与时针共旋转360°+30°=390°,分针比时针多旋转360°-30°=330°.它们在圆面上追赶着,某时刻分针与时针形成一定夹角(以下称换位夹角),经过一段时间(以下称换位时间)时针指向分针这一时刻的位置,同时分针却指向时针该时刻的位置.在这个过程中,分针与时针共旋转的角度(以下称共转周数)总是圆周角的整数倍,其中时针旋转的角度以下称时针转角.就像游戏一般,分针与时针你来我往,悄悄地经历着不同共转周数的换位.为了弄清分针与时针换位的规律,还是从0时两针重合指向“12”时开始跟踪吧.
The minute hand and the hour hand rotate constantly. One minute minute hand rotates 360 ° and the hour hand rotates 30 °. The minute hand and the hour hand rotate 360 ° + 30 ° = 390 °. The minute hand rotates 360 ° -30 ° = 330 ° more than the hour hand. They are chasing the circle, at a time point and the hour hand to form a certain angle (hereinafter referred to as the angle of change), after a period of time (hereinafter referred to as transposition time) point to the minute hand at this moment position, while the minute hand points to the hour hand At this point in time, the angle at which the minute hand and the hour hand co-rotate (hereinafter referred to as the co-rotating week) is always an integer multiple of the circumference angle, where the angle of the hour hand is hereinafter referred to as the hour hand corner. The hour hand you come to me, quietly experiencing the conversion of the different co-rotating weeks.In order to understand the minute and hour transposition of the law, or from 0:00 when the two-pin coincidence point “12 ” began to track it.