√3tan21°*tan39°+tan21°+tan39°=
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:2024/11/19 22:13:34
√3tan21°*tan39°+tan21°+tan39°=
tan(a+b)=(tanA+tanB)/(1-tanAtanB)
(1-tanAtanB)=(tanA+tanB)/tan(A+B)
tanAtanB)=1-(tanA+tanB)/tan(A+B)
√3tan21°*tan39°+tan21°+tan39°
=√3[1-(tan21°+tan39°)/tan(21°+39°)]+tan21°+tan39°
=√3-√3(tan21°+tan39°)/tan(60°)+tan21°+tan39°
=√3-√3(tan21°+tan39°)/√3+tan21°+tan39°
=√3-(tan21°+tan39°)+tan21°+tan39°
=√3-tan21°-tan39°+tan21°+tan39°
=√3
(1-tanAtanB)=(tanA+tanB)/tan(A+B)
tanAtanB)=1-(tanA+tanB)/tan(A+B)
√3tan21°*tan39°+tan21°+tan39°
=√3[1-(tan21°+tan39°)/tan(21°+39°)]+tan21°+tan39°
=√3-√3(tan21°+tan39°)/tan(60°)+tan21°+tan39°
=√3-√3(tan21°+tan39°)/√3+tan21°+tan39°
=√3-(tan21°+tan39°)+tan21°+tan39°
=√3-tan21°-tan39°+tan21°+tan39°
=√3
√3tan21°*tan39°+tan21°+tan39°=
tan21°+tan39°分之1-tan21°tan39°
tan21°+tan39°-根号tan21°*tan39°的值为?
根号3tan21°tan39°+cot69°+cot51° 不直接用计算器
cot39°等于?tan39?
tan39°的值多少?
tan39°等于多少 精确到0.1
tan21°+tan24°+tan21°tan24°的值怎么算啊?
tan37°tan38°tan39°.tan51°tan52°tan53°= 具体解法
tan39度=?
1.比大小:tan21°和tan31°;2.sin21°和cos21°;3.cos21°和cos22°
(1+tan21°)(1+tan22°)(1+tan23°)(1+tan24°)的值是 ______.