题目

0° ,30°,37°,45°,53° ,60° ,90°,120°,135° ,150°,180 °的sin ancos 值.（要
好的有加分,最好有给【根号】,计算器只能算近似值.能不能附带一点关于根号的解题技巧

提问时间：2021-01-28

答案

sin0° =0,cos0° =1,tan0° =0sin30° =1/2,cos30° =√3/2,tan30° =√3/3sin37° =0.602,cos37° =0.799,tan37° =0.754sin45° =√2/2,cos45° =√2/2,tan45° =1sin53° =0.799,cos53° =0.602,tan53°=0.754si...