sin10°乘以sin40°+sin50°乘以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:2024/04/25 11:53:29
sin10°乘以sin40°+sin50°乘以sin80°
原式=cos80°cos50°+sin50°sin80°
=cos(80°-50°)
=cos30°
=(根号3)/2
=cos(80°-50°)
=cos30°
=(根号3)/2
求值:sin10°sin50°sin70°sin80°
sin10°+sin20°+sin40°+sin50°+sin70°+sin80°求步骤加答案各方学霸求解答谢谢啦!
求值[2sin50°+sin10°(1+√3tan10°)]*√2(sin80°)*(sin80°)
[2sin50°+sin10°(1+√3tan10°)]*√2(sin80°)*(sin80度)
求[2sin50°+sin10°(1+√3tan10°0]sin80°的值
求值:[2sin50°+sin10°(1+√3tan10°)]×√2sin80°
sin10°+sin20°+sin30°+sin40°+sin50°+……+sin2000°=?
sin40°cos10°-SIN10°SIN50°的值是
1/sin10°-根号3/sin80°
1/sin10°-√3/sin80°
请问这个题怎么解?sin50°+sin10°(1+根号3*tan10°)根号下2*sin80°平方
化简【2sin50°+sin10°(1+根号3tan10°)】乘根号下2(sin80°的平方)