求(tan10°-根号3)*cos10°/sin50°的值
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/09/24 11:32:36
求(tan10°-根号3)*cos10°/sin50°的值
(tan10°-√3)*cos10°/sin50°
=(sin10°-√3cos10°)/sin50°
=2(1/2*sin10°-√3/2*cos10°)/sin50°
=2(sin10°cos60°cos10°sin60°)/sin50°
=2sin(10-60)°/sin50°
=2sin(-50)°/sin50°
=-2sin50°/sin50°
=-2
再问: 哇 好厉害啊, 都不用打草稿直接在电脑上打出来的吗 ................好厉害好厉害
=(sin10°-√3cos10°)/sin50°
=2(1/2*sin10°-√3/2*cos10°)/sin50°
=2(sin10°cos60°cos10°sin60°)/sin50°
=2sin(10-60)°/sin50°
=2sin(-50)°/sin50°
=-2sin50°/sin50°
=-2
再问: 哇 好厉害啊, 都不用打草稿直接在电脑上打出来的吗 ................好厉害好厉害
求(tan10°-根号3)*cos10°/sin50°的值
化简:cos10°(tan10°-根号3)/sin50°
求值:(tan10°-根号3)cos10°÷sin50°
化简(tan10°-根号3)*(cos10°/sin50°)*(2cos10°-sin20°/cos20°)
化简:(tan10°−3)•cos10°sin50°
求值:(tan10°-√3)×cos10°/sin50°
(tan10°–√3)cos10°/sin50°
化简(tan10°—根号3)乘以cos10°/sin50°
(tan10°-根号3)×cos10°÷sin50°
计算(tan10-根号3)*cos10/sin50
2sin50°+cos10°(1+3tan10°)1+cos10°
sin50°(1+根号3tan10°)