1/sin10°-√3/sin80°=______________我用计算机算出来是4
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1/sin10°-√3/sin80°=______________我用计算机算出来是41/sin10°-√3/sin80°=______________我用计算机算出来是41/sin10°-√3/si
1/sin10°-√3/sin80°=______________我用计算机算出来是4
1/sin10°-√3/sin80°=______________
我用计算机算出来是4
1/sin10°-√3/sin80°=______________我用计算机算出来是4
原式=1/sin10-√3/cos10
=(cos10-√3sin10)/sin10cos10
=2(1/2cos10-√3/2*sin10)/sin10cos10
=2cos(10+60)/sin10cos10
=4cos70/sin20
=4
1/sin10°-√3/sin80°
求值:1/sin10°-√3/sin80°
1/sin10°— √3/sin80°
1/sin10°-根号3/sin80°=
1/sin10°-√3/sin80°=______________我用计算机算出来是4
求值[2sin50°+sin10°(1+√3tan10°)]*√2(sin80°)*(sin80°)
[2sin50°+sin10°(1+√3tan10°)]*√2(sin80°)*(sin80度)
1/sin10°-根号3/sin80°的值为
1/sin10°-根号3/sin80°的值为
求值:1/sin10°-根号3/sin80°
求值:[2sin50°+sin10°(1+√3tan10°)]×√2sin80°
求[2sin50°+sin10°(1+√3tan10°0]sin80°的值
sin10°cos35°+sin80°sin35°=?
1/sin10度 - 3的根号/sin80度=?
三角函数化简,解释一下这两步怎么来的.=[(sin80°-sin20°)-sin20°]/2sin10° =(2cos50°sin30°-sin20°)/2sin10° ▲=(sin40°-sin20°)/2sin10° =2cos30°sin10°/2sin10° ▲=cos30° =√3/2
1/sin10°-根号3/sin80°原式=1/sin10-√3/cos10 =(cos10-√3sin10)/sin10cos10 =2(1/2cos10-√3/2*sin10)/sin10cos10 =2cos(10+60)/sin10cos10 =4cos70/sin20 =4请将=2(1/2cos10-√3/2*sin10)/sin10cos10 =2cos(10+60)/sin10cos10 写的更细些不明白2
sin50°(cos10°+√3sin10°)/sin80°的值()A1/2 B-1/2 C1 D-1
化简【2sin50°+sin10°(1+根号3tan10°)】乘根号下2(sin80°的平方)