解:tan2度44分=tan(2+44÷60)度≈0.04774189tan2°44′等于0.04774189
tan2°44′≈0.0477418892
tan(2°44')=0.0477418892013101追问那tan(2°52′40″)等于多少啊
追答tan(2°52'40")=0.0502689760098971