三角函数,有图更好
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:2024/07/07 17:32:15
三角函数,有图更好
![](http://img.wesiedu.com/upload/2/3b/23b4a0f8196609b355a7ca4a0dc161ae.jpg)
![](http://img.wesiedu.com/upload/2/3b/23b4a0f8196609b355a7ca4a0dc161ae.jpg)
![三角函数,有图更好](/uploads/image/z/17203954-58-4.jpg?t=%E4%B8%89%E8%A7%92%E5%87%BD%E6%95%B0%2C%E6%9C%89%E5%9B%BE%E6%9B%B4%E5%A5%BD%26nbsp%3B)
sin50(1+√3tan10)
=sin50[1+√3(sin10/cos10)]
=sin50[(cos10+√3sin10)/cos10]
=sin50[2sin(30+10)/cos10]
=(2sin50sin40)/cos10°
=(2cos40°*sin40°)/cos10°
=sin80°/cos10°
=cos10°/cos10°
=1
再问: 能发图片吗?这样看很累
=sin50[1+√3(sin10/cos10)]
=sin50[(cos10+√3sin10)/cos10]
=sin50[2sin(30+10)/cos10]
=(2sin50sin40)/cos10°
=(2cos40°*sin40°)/cos10°
=sin80°/cos10°
=cos10°/cos10°
=1
再问: 能发图片吗?这样看很累