cos53.13度等于0.60000142913266
cos(53.13°)=0.60000142913266
cos53.13度等于0.60000142913266
cos(53.13°)=0.60000142913266
cos53.13度等于0.60000142913266
cos(53.13°)=0.60000142913266
cos53.13度等于0.60000142913266
cos(53.13°)=0.60000142913266
cos53.13度等于0.60000142913266
cos(53.13°)=0.60000142913266
cos53.13度等于0.60000142913266
cos(53.13°)=0.60000142913266
cos53.13度等于0.60000142913266
cos(53.13°)=0.60000142913266
cos53.13度等于0.60000142913266
cos(53.13°)=0.60000142913266