已知f(x)=sin(wx 3 π)f(6 π)=(3 π)

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已知f(x)=sin(wx 3 π)f(6 π)=(3 π)
已知函数f(x)=sin(2x+π/3)

1、由于函数g(x)=sin(2(x-a)+π/3)为偶函数,所以g(x)的图像关于y轴对称,即函数g(x)当x=0时取得最值,所以g(0)=±1,解得sin(π/3-2a)=±1,sin(2a-π/

已知f(x)=cos^2x+sinxcosx g(x)=2sin(x+π/4)sin(x-π/4)

f(x)=cos^2x+sinxcosx=(1+cos2x)/2+1/2*sin2x=1/2+1/2(cos2x+sin2x)=√2/2*(√2/2*cos2x+√2/2sin2x)+1/2=√2/2

已知f(x)=cos^2x/1+sin^2x求f'(π/4)

f(x)=[1+cos2x)/2]/[1+(1-cos2x)/2]=(1+cos2x)/(3-cos2x)=-1+4/(3-cos2x)f'(x)=-4/(2-cos2x)^2*(2-cos2x)'=

已知函数f(x)=2sin(π-x)cosx

∵f(x)=2sin(π-x)cosx=2sinxcosx=sin2x1、最小正周期T=2π/2=π.2、∵-π/6≤x≤π/2∴-π/3≤2x≤π,∴-√3/2≤f(x)≤1,∴最大值1,最小值-√

已知函数f(x)=2√3sin²x-sin(2x-π/3)

(1)f(x)=√3(1-cos2x)-1/2sin2x+√3/2cos2x=√3-1/2sin2x-√3/2cos2x=√3-sin(2x+π/3)∴最小正周期T=2π/2=π单调增区间:π/2+2

已知函数f(x)=sin(π/2-x)+sinx

f(x)=cosx+sinxf(x)=√2sin(x+π/4)(1)递增区间:2kπ-π/2≤x+π/4≤2kπ+π/2得:2kπ-3/4π≤x≤2kπ+π/4递增区间是:[2kπ-3π/4,2kπ+

已知函数f(x)=2sin(π-x)sin(π/2-x)

f(x)=2sin(π-x)sin(π/2-x)=2sinxcosx=sin2x1)最小正周期=2π/2=π2)在区间[-派/6,派/2]上x=π/4时,有最大值=sinπ/2=1x=-π/6时,有最

已知函数f(x)=2sin(ax-π/6)sin(ax+π/3)

你的题目是这样的吗已知函数f(X)=2sin(ax-π/6)sin(ax+π/3)(其中a为正常数,x∈R)的最小正周期为π(1)求a的值(2)在△ABC中,若A<B,且f(A)=f(B)=1/2,求

已知f(x)=2sin(2x+π/6),

π2x+π/6属于[π/2+2kπ,3π/2+2kπ]时为减区间,所以x属于[π/6+kπ,2π/3+kπ],k属于Z列表:三行2x+π/60π/2π3π/22πx(根据上面一行的值求出x对应的值)f

已知f(sin x)=cos 3x,求f(cos π/9)的值.

f(sin(pai/2-x))=cos[3(pai/2-x)]f(cosx)=cos(3pai/2-3x)f(cospai/9)=cos(3pai/2-pai/3)=-sinpai/3=-根号3/2f

已知函数f(x)=2sinx*sin(π/2+x)-2sin^2x+1

f(x)=2sinx*sin(π/2+x)-2sin^2x+1=2sinxcosx+cos2x=sin2x+cos2x=√2sin(2x+π/4)因为f(x0/2)=根2/3所以sin(x0+π/4)

已知函数f(x)=cos2x\ sin(x+π\4),求函数f(x)的定义域

首先:定义域只有这一个,X+π/4≠2Kπ,所以X≠-π/4+2kπ..附上值域,化简原函数:f(X)=cos2X/[√2/2(sinX+cosX)]f(x)=(cos²X-sin²

已知函数f(x)=sinx+sin(x+π/2) ,

因为f(x)=sinx+cosx=√2sin(x+π/4)第一题T=2π/1=2π第二题当sin(x+π/4)=1时,为最大值,即f(x)=√2sin(x+π/4)=-1时,为最小值,即f(x)=-√

已知函数f(x)=2根号3sin平方x-sin(2x-π/3)

f(x)=2√3sin²x-sin(2x-π/3)=√3-√3cos2x-1/2sin2x+√3/2cos2x=√3-(1/2sin2x+√3/2cos2x)=√3-sin(2x+π/3)T

已知f(x)=sin

(根号2+根号6)÷4再问:如何做的??????????谢谢

高中数学:已知函数f(x)=2sin(x+π/2).sin(x+7π/3)-

fx=2cosx(0.5sinx+根号3/2cosx)-根号3sin*2x+sinxcosx=2sinxcosx+根号3(cos*2x-sin*2x)=sin2x+根号3cos2x=2sin(2x+派

已知函数f(x)=1-sin πx/2,则f(0)+f(1)+f(2)+.+f(2010)=

正弦函数周期为2π,函数所以f(x)=1-sinπx/2最小正周期为:T=2π/(π/2)=4所以只需计算前四项值:f(0)=1,f(1)=0,f(2)=1,f(3)=2而2010/4=502余2所以

已知函数f(x)=cos2x/[sin(π/4-x)]

cos2x=sin(π/2-2x)=2sin(π/4-x)cos(π/4-x)cos2x/[sin(π/4-x)]=2sin(π/4-x)cos(π/4-x)/[sin(π/4-x)]=2cos(π/

已知函数f(x)=sin(π-x)sin(π2-x)+cos2x

(Ⅰ)f(x)=sinx•cosx+12cos2x+12=12sin2x+12cos2x+12=22sin(2x+π4)+12∴函数f(x)的最小正周期T=2π2=π(Ⅱ)当x∈[−π8,3π8]时,

已知函数f(x)=sin^2 x+2根号3sinxcosx+sin(x+π/4)sin(x-π/4),x属于R,求f(x

f(x)=sin^2x+2√3sinxcosx+sin(x+π/4)sin(x-π/4)=(1-cos2x)/2+√3sin2x+(1/2)2sin(x-π/4)cos(x-π/4)=2-2cos2x