求值:1/sin50°+根号3/cos50°
求值:2sin50°+cos10°*(1+根号3tan10°)/cs35°cos40°+cos50°cos55°
计算1sin50°+3cos50°
化简求值2sin50°+cos10°(1+3tan10°)cos35°cos40°+cos50°cos55°
sin50°(1+根号3tan10°)求值、
求值{cos40°+sin50°(1+根号3tan10°)}/1+sin50°
2sin50°cos50°怎么等于cos50°cos40°+sin50°sin40°
求值:(tan10°-根号3)cos10°÷sin50°
求值sin50°(1+根号3tan10°)(过程)
(sin40°cos50°+sin50°cos40°)=1 怎么等于1的啊
计算sin50°cos40°+cos50°sin40°
sin50°*cos40°+cos50°*sin40°
sin50°=a cos40°=?cos50°?