√2(cos50°-sin50°).化简
2sin50°cos50°怎么等于cos50°cos40°+sin50°sin40°
计算1sin50°+3cos50°
求值:2sin50°+cos10°*(1+根号3tan10°)/cs35°cos40°+cos50°cos55°
计算sin50°cos40°+cos50°sin40°
sin50°*cos40°+cos50°*sin40°
sin50°=a cos40°=?cos50°?
化简求值2sin50°+cos10°(1+3tan10°)cos35°cos40°+cos50°cos55°
(sin40°cos50°+sin50°cos40°)=1 怎么等于1的啊
化简:sin50°(1+√3tan10°)
化简:cos10°(tan10°-根号3)/sin50°
求值:(tan10°-√3)×cos10°/sin50°
(tan10°–√3)cos10°/sin50°