划线的~
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/27 13:44:04
划线的~
划线的~
划线的~
sinθ+cosθ
=√2(√2/2sinθ+√2/2cosθ)
=√2(sinθcos(π/4)+sin(π/4)cosθ)
=√2sin(θ+π/4)
sinθ+cosθ=√2((sinπ/4)×(sinθ)+(cosπ/4)×cosθ)=√2sin(π/4+θ)
划线的~
划线的~
划线的~
sinθ+cosθ
=√2(√2/2sinθ+√2/2cosθ)
=√2(sinθcos(π/4)+sin(π/4)cosθ)
=√2sin(θ+π/4)
sinθ+cosθ=√2((sinπ/4)×(sinθ)+(cosπ/4)×cosθ)=√2sin(π/4+θ)