There is an electronic clock on the clock tower of a railway station. On the boundary of the clock face, there is a small colored light at the scale of every minute. At 9:35:20 PM, how many small colored lights are there in the angle α between the hour hand and the minute hand? Have a detailed formula process and ideas, I don't want that kind of long row of text description. Use formula to write out. Finally, with the idea of solving the problem
35 minutes 20 seconds = = > 0 ° between minute hand and 7 o'clock,