求值:[2sin50°+sin10°(1+√3tan10°)]×√2sin80°
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求值:[2sin50°+sin10°(1+√3tan10°)]×√2sin80°求值:[2sin50°+sin10°(1+√3tan10°)]×√2sin80°求值:[2sin50°+sin10°(1
求值:[2sin50°+sin10°(1+√3tan10°)]×√2sin80°
求值:[2sin50°+sin10°(1+√3tan10°)]×√2sin80°
求值:[2sin50°+sin10°(1+√3tan10°)]×√2sin80°
[2sin50°+sin10°(1+√3tan10°)]√(2sin80°)
= [2sin50 + sin10(cos10+√3sin10)/cos10]√2sin80
= [2sin50cos10+2sin10(cos60cos10+sin60sin10)√2sin80/cos10
= 2[sin50cos10 + sin10cos(60-10)]√2
= 2sin(50+10)√2
= √6
求值:[2sin50°+sin10°(1+√3tan10°)]×√2sin80°
求值:【2sin50°+sin10°(1+根号3tan10°)】根号2sin280°
求值sin10°sin30°sin50°sin70°
求值:sin10°sin50°sin70°sin80°
求值:sin10°sin50°·sin70°
sin10°sin50°sin70° 怎样化简求值?
求值[2sin50°+sin10°(1+√3tan10°)]*√2(sin80°)*(sin80°)
求值:[2sin50°+sin10°(1+√3tan10°)]√(1-sin^2 10°)
sin10°sin50°为什么等于1/2(cos40-cos60)
[2sin50°+sin10°(1+根号3tan10°)]乘sin10°等于?
Sin10°cos60°sin50°cos20°sin90°不查表求值
求值【2sin50+sin10(1+根号3*tan10)]*根号下2*sin80,
2sin50°+2sin10°sin40°/cos10°
化简:2sin50°+sin10°/cos10°
化简(2sin50°+sin10°)/cos10°
(2sin10°+sin50°)÷cos50°
化简[2sin50°+sin10°(1+√3tan10°)] √(2sin280°)
[2sin50°+sin10°(1+√3tan10°)]•√(sin²80°)