sinx+cosx=根号2sin(?)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/05/20 15:32:56
sinx+cosx=根号2sin(?)sinx+cosx=根号2sin(?)sinx+cosx=根号2sin(?)sinx+cosx=√2(sinx×√2/2+cosx×√2/2)=√2(sinx×c

sinx+cosx=根号2sin(?)
sinx+cosx=根号2sin(?)

sinx+cosx=根号2sin(?)
sinx+cosx
= √2(sinx× √2/2+cosx× √2/2)
=√2(sinx×cosπ/4+cosx×sinπ/4)
=√2sin(x+π/4)

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