sin乘以二分之派加cos二分之派加sin三分之派减cos六分之派加tan零
=1+0+√3/2-√3/2+0
=1
原式=sin90°+cos90°+sin60°-cos30°+tan0°
=1+0+(√3/2)-(√3/2)+0
=1
π=180°
sin不能直接乘数字吧
sinπ/2 + cosπ/2 + sinπ/3 - cosπ/6 + tan0°
已知 π=180°
原式=sin90 + cos90 + sin60 - cos30 + tan0°
=1+0+(√3/2)-(√3/2)+0
=1
1