sin2X/(1+cosX+sinX)化简
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/13 12:15:02
sin2X/(1+cosX+sinX)化简
sin2X/(1+cosX+sinX)化简
sin2X/(1+cosX+sinX)化简
sin2X/(1+cosX+sinX)=2sinxcosx/(1+cosX+sinX)=[(cosx)^2+2sinxcosx+(sinx)^2-1]/(1+cosX+sinX)=[(cosX+sinX)^2-1]/(1+cosX+sinX)=cosX+sinX-1