cos18°3′9″=0.950772965或者说cos18.0525=0.950772965 18°3′9″=18+3/60+9/3600=18+0.05+0.0025=18.0525所以cos18°3′9″=0.950772965
不是特殊角直接查三角函数表
cos18°3'9''=cos10.0525°=0.95077297
0.9601
