问题
填空题
已知sinα=0.8310,则锐角α=______;cosα=0.9511,则锐角α=______(精确到1′).
答案
①按MODE,出现:DEG,按SHIFT,sin,0.8310,=,显示:56.20159962,按“DEG?”,显示:56°12′;
②按MODE,出现:DEG,按SHIFT,cos,0.9511,=,显示:17.99193581,按“DEG?”,显示:17°59′30.97,∴18°0′