14周胎停是什么原因:化简2sinxcosx+cos2x
来源:百度文库 编辑:高校问答 时间:2024/05/24 06:03:49
请给我点详细过程,多谢
2sinxcosx=sin2x
2sinxcosx+cos2x=根号2[sin(2x+π/4)]
原式=sin2x+cos2x=2^(0.5)sin(2x+pi/4)
2sinxcosx+cos2x=根号2[sin(2x+π/4)]
2sinxcosx=sin2x
2sinxcosx+cos2x=根号2[sin(2x+π/4)]
原式=sin2x+cos2x=2^(0.5)sin(2x+pi/4)
2sinxcosx+cos2x=根号2[sin(2x+π/4)]