cos(π/3-2x)怎样化等于sin(2x+π/6)
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/17 06:49:52
cos(π/3-2x)怎样化等于sin(2x+π/6)cos(π/3-2x)怎样化等于sin(2x+π/6)cos(π/3-2x)怎样化等于sin(2x+π/6)cos(π/3-2x)=cos(π/3
cos(π/3-2x)怎样化等于sin(2x+π/6)
cos(π/3-2x)怎样化等于sin(2x+π/6)
cos(π/3-2x)怎样化等于sin(2x+π/6)
cos(π/3-2x)=cos(π/3)
sin(2x+π/6))=sin(π/6)
因为cos(π/3)=sin(π/6)
所以cos(π/3-2x)=sin(2x+π/6)
另一种解法:
cos(π/3-2x) 根据公式 cosx=sin(π/2-x) 得
=sin[π/2-(π/3-2x)]
=sin[(π/2-π/3)+2x]
=sin(2x+π/6)
cos(π/3-2x)
=sin[π/2-(π/3-2x)]
=sin[(π/2-π/3)+2x]
=sin(2x+π/6)
一个角的余弦值等于它的余角的正弦值
或者说
两角互余,一个角的余弦值等于另一个角的正弦值
cos(π/3-2x)=cos[(π/2-(2x+π/6)]=sin(2x+π/6)
cos(π/3-2x)
=cos[2π-(π/3-2x)]
=cos(2x+5π/3)
=cos[π+(2x+2π/3)]
=-cos(2x+2π/3)
=-cos(π/2+2x+π/6)
=sin(2x+π/6)
cos(π/3-2x)怎样化等于sin(2x+π/6)
sin cos之间怎么转换?sin(π/3-2X)等于cos多少?
cos(x+π/3)是不是等于sin(x-π/6)
sin^3x-cos^3x化简等于多少
怎样化简f(x)=sin(2x+π/6)+根3cos(2x-π/6)-3sin(2x+π/2)
sin²(π/4+x)怎样等于cos²(π/4-x)?
sin(2x+ π/3)乘cos(2x+π/3)等于
若cos(π/3-2x)=-7/8则sin(x+π/3)等于
sin2x+sin(π-x)/2cos2x+2sin²x+cos(-x)等于多少
为什么2(cosπ/3-cosx)等于-4sin((π/3-x)/2)*sin((π/3+x)/2)
三角函数的计算题sin(X-2π)+sin(-x-3π)cos(X-3π)/cos(π-x)-cos(-π-x)cos(x-4π)等于多少?
怎样化简函数 cosπ/4cosπ/3-sinπ/4sinπ/3cosπ/4cosπ/3-sinπ/4sinπ/3
sin(sin(sin(sin(x)=cos(cos(cos(cos(x),X等于多少?
2sin@+cos@等于?
cos2x cosπ/5+sin2x sinπ/5为什么等于cos(2x-π/5)?
函数y=2sin( π/3 -x)-cos( π/6 +x)(x∈R)的最小值等于
函数f(x)=根号3sinωx+cosωx(ω>0)怎样变为f(x)=2sin(ωx+π/6)
极限,三角函数问题lim x趋于π (sin x)^2/1+(cos x)^3等于多少?