1/sin10°-√3/sin80°
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/08/08 02:11:43
1/sin10°-√3/sin80°
![1/sin10°-√3/sin80°](/uploads/image/z/14846775-15-5.jpg?t=1%2Fsin10%C2%B0-%E2%88%9A3%2Fsin80%C2%B0)
1/sin10-√3/sin80
=(sin80-√3*sin10)/(sin80*sin10)
=(cos10-√3*sin10)/(cos10*sin10)
=4(cos10/2-√3*sin10/2)/(2sin10*cos10)
=4*(cos60*cos10-sin60*sin10)/sin20
=4*cos(60+10)/sin20
=4*cos70/sin20
=4
=(sin80-√3*sin10)/(sin80*sin10)
=(cos10-√3*sin10)/(cos10*sin10)
=4(cos10/2-√3*sin10/2)/(2sin10*cos10)
=4*(cos60*cos10-sin60*sin10)/sin20
=4*cos(60+10)/sin20
=4*cos70/sin20
=4
1/sin10°-√3/sin80°
1/sin10°-根号3/sin80°
1/sin10°— √3/sin80°
求值:1/sin10°-√3/sin80°
求值[2sin50°+sin10°(1+√3tan10°)]*√2(sin80°)*(sin80°)
[2sin50°+sin10°(1+√3tan10°)]*√2(sin80°)*(sin80度)
求值:1/sin10°-根号3/sin80°
不查表,计算1/sin10°-(根号3)/sin80°=
1/sin10°-根号3/sin80°的值为
1/sin10°-根号3/sin80°=
求值:[2sin50°+sin10°(1+√3tan10°)]×√2sin80°
求[2sin50°+sin10°(1+√3tan10°0]sin80°的值