2sin20°+(cos10°/cos20°)=

来源:学生作业帮助网 编辑:六六作业网 时间:2025/01/03 04:29:45
2sin20°+(cos10°/cos20°)=2sin20°+(cos10°/cos20°)=2sin20°+(cos10°/cos20°)=2sin20°+(cos10°/cos20°)=(2si

2sin20°+(cos10°/cos20°)=
2sin20°+(cos10°/cos20°)=

2sin20°+(cos10°/cos20°)=
2sin20°+(cos10°/cos20°)
=(2sin20°cos20°+cos10°)/cos20°
=(sin40°+cos10°)/cos20°
=(sin40°+sin80°)/cos20°
=2sin60°cos20°/cos20°
=2sin60°
=√3

看是要哪种结果啊,计算器也可以算