137·53≈ 137.5300 19π∕3π=19/3=6.3333=6 -17π∕8≈-17*3.1/8=-6.58=-7
sin(-852.28°）≈-sin852.28°=-0.73987=-0.7399
COS1604.209°=-0.96226=-0.96236.28=6
97.5°=97.5000°
tan796°43’=tan796.7167°=4.2358
arc tan 0.3415=18.9=19
谁能教我中专的数学计算器 要怎么按出来 ）
137·53≈ 137.5300 19π∕3π=19/3=6.3333=6 -17π∕8≈-17*3.1/8=-6.58=-7
sin(-852.28°）≈-sin852.28°=-0.73987=-0.7399
COS1604.209°=-0.96226=-0.96236.28=6
97.5°=97.5000°
tan796°43’=tan796.7167°=4.2358
arc tan 0.3415=18.9=19