化简:[2sin50°+sin10°(1+根号3*tan10°)]*根号sin^280°
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化简:[2sin50°+sin10°(1+根号3*tan10°)]*根号sin^280°
化简:[2sin50°+sin10°(1+根号3*tan10°)]*根号sin^280°
化简:[2sin50°+sin10°(1+根号3*tan10°)]*根号sin^280°
[2sin50+sin10(1+根号3*tan10) ]根号(sin^2(80))
= [2sin50+sin10(1+根号3*sin10/cos10) ] sin80
= [2sin50+sin10(1+根号3*sin10/cos10) ] cos10
= 2sin50cos10 + sin10(cos10+根号3*sin10)
= 2sin50cos10 + sin10 { 2( sin30 cos10+cos30 sin10) }
= 2sin50cos10 + sin10 { 2 sin(30+10) }
= 2sin50cos10 + 2sin10 sin40
= 2 {sin50cos10 + sin10 cos(90-40) }
= 2 {sin50cos10 + cos50sin10}
= 2 sin(50+10)
= 2sin60
=2*根号3/2
= 根号3
化简:2sin50°+sin10°/cos10°
化简(2sin50°+sin10°)/cos10°
sin10°sin50°为什么等于1/2(cos40-cos60)
[2sin50°+sin10°(1+根号3tan10°)]乘sin10°等于?
化简[2sin50°+sin10°(1+√3tan10°)] √(2sin280°)
化简:[2sin50°+sin10°(1+根号3*tan10°)]*根号sin^280°
化简:sin10°sin50°sin60°sin70°
2sin50°+2sin10°sin40°/cos10°
(2sin10°+sin50°)÷cos50°
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°
[2sin50°+sin10°(1+√3tan10°)]•√(sin²80°)
求[2sin50°+sin10°(1+√3tan10°0]sin80°的值
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+根号三tan10°)]*根号[2(sin80°)平方]拜托了各位 RT