sin2230’cos2230’=
来源:学生学帮网 编辑:学帮网 时间:2024/07/03 09:47:23
sin2230’cos2230’=
利用二倍角公式:
sin2A=2sinAcosA
sin22.5*cos22.5
=1/2*sin45
=1/2*根号2/2
=根号2、4
sin2230’cos2230’
=2sin22.5度cos22.5度/2
=sin45度/2
=2^(1/2)/2/2
=2^(1/2)/4
sin2230’cos2230’=
利用二倍角公式:
sin2A=2sinAcosA
sin22.5*cos22.5
=1/2*sin45
=1/2*根号2/2
=根号2、4
sin2230’cos2230’
=2sin22.5度cos22.5度/2
=sin45度/2
=2^(1/2)/2/2
=2^(1/2)/4