化简:[2sin50°+sin10°*(1+√3 tan 10°)]√2sin^2 80°
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/20 08:51:15
化简:[2sin50°+sin10°*(1+√3tan10°)]√2sin^280°化简:[2sin50°+sin10°*(1+√3tan10°)]√2sin^280°化简:[2sin50°+sin1
化简:[2sin50°+sin10°*(1+√3 tan 10°)]√2sin^2 80°
化简:[2sin50°+sin10°*(1+√3 tan 10°)]√2sin^2 80°
化简:[2sin50°+sin10°*(1+√3 tan 10°)]√2sin^2 80°
∵cos10+√3sin10
=2[(1/2)cos10+(√3/2)sin10]
=2(cos60cos10+sin60sin10)
=2cos(60-10)
=2cos50
∴{2sin50+[1+(√3)tan10]sin10}×√[2(sin80)^]
={2sin50+[1+(√3)(sin10/cos10)]sin10}×√[2(sin80)^]
={2sin50+[1+(√3)(sin10/cos10)]sin10}×√[2(sin80)^]
={2sin50+[cos10+(√3)(sin10)]sin10/cos10}×√[2(sin80)^]
=[2sin50+(2cos50sin10/cos10)]×(√2)(sin80)
=2[(cos10sin50+cos50sin10)/cos10]×(√2)cos10
=2(sin60/cos10)×(√2)(sin80)
=(2√2)×(√3)/2=√6
化简:2sin50°+sin10°/cos10°
化简(2sin50°+sin10°)/cos10°
化简:sin10°sin50°sin60°sin70°
2sin50°+2sin10°sin40°/cos10°
(2sin10°+sin50°)÷cos50°
sin10°sin50°为什么等于1/2(cos40-cos60)
化简[2sin50°+sin10°(1+√3tan10°)] √(2sin280°)
化简:[2sin50°+sin10°(1+根号3*tan10°)]*根号sin^280°
[2sin50°+sin10°(1+根号3tan10°)]乘sin10°等于?
计算 sin10°^2 + sin50°^2 + sin10°sin50° 的值? 答案:3/4我没学和积化差 ,,请用别的方法!
化简:[2sin50°+sin10°*(1+√3 tan 10°)]√2sin^2 80°
化简【2sin50°+sin10°(1+根号3tan10°)】乘根号下2(sin80°的平方)
化简[2sin50°+sin10°(1+√3tan10°)] √(sin²80°)尽量简单点
求值:[2sin50°+sin10°(1+√3tan10°)]×√2sin80°
求值:【2sin50°+sin10°(1+根号3tan10°)】根号2sin280°
sin^2 10°+ sin^2 50°+ sin10°sin50°计算 ,
[2sin50°+sin10°(1+√3tan10°)]•√(sin²80°)
求[2sin50°+sin10°(1+√3tan10°0]sin80°的值