收集数据:90 91 89 96 90 98 90 97 91 98 99 97 91 88 90 97 95 90 95 88
( =1.41,sin67.5°=0.92,cos67.5°=0.38,tan67.5°=2.41,sin22.5°=0.38,cos22.5°=0.92,tan22.5°=0.41)