若函数fx=2sin(2x-π 3

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若函数fx=2sin(2x-π 3
已知函数fx=[cosx+cos(π/2-x)][cosx+sin(π+x)]

f(x_=(cosx+sinx)(cosx-sinx)=cos²x-sin²x=cos2x所以T=2π/2=πf(α/2)=cosα=1/3sin²α+cos²

已知函数fx=2sin(2x+π/3)+2

(1)f(x)=2sin(2x+π/3)+2由2x+π/3=kπ+π/2,k∈Z得2x=kπ+π/6,k∈Z对称轴方程为x=kπ/2+π/12,k∈Z(2)g(x)=f(x)+m=2sin(2x+π/

设函数fx=sin( φ-2x)(0

设函数fx=sin(φ-2x)(0

已知函数fx=2sin(2x+π/4) x∈R (1) 求f(3π/8)的值 (2) 若(已知函数fx=2sin(2x+

1)带进去得f(3兀/8)=-22)你的问题是不是少打了f,如果题目是f(A/2-兀/8)=二分之根号三的话,由此式可得sinA=四分之根三,又由A的范围得cosA为-十三分之根号三十九。由cosB知

已知函数fx =2 sin(2x+ pai /6)

fx=2sin(2x+pai/6)振幅A=2最小正周期T=2pai/2=paix∈【0,pai/]2xE[0,2pai]2x+pai/6E[pai/6,2pai+pai/6]很明显,设u=2x+pai

已知函数fx=2sin(x-π/3求函数周期

周期等于2派.g(x)=2sinx;基函数再问:有过程吗??再答:这可以看出来,还要过程吗,,,,周期等于2派/x前的数1===2派;;g(x)=2sint(x+pi/3+p1/3)=2sinx;si

已知函数fx=sin(2x+π/6)+2(sinx)∧2

1.f(x)=根号3/2sin2x+1/2cos2x+2sin²x=根号3/2sin2x+1/2cos2x+1-cos2x=根号3/2sin2x-1/2cos2x+1=sin(2x-π/6)

函数fx=sin(2x-(π/6))在区间[0,π/2]的值域

0≤x≤π/20≤2x≤π-π/6≤2x-π/6≤5π/6f(x)max=f(π/3)=1f(x)min=f(0)=-1/2f(x)的值域是[-1/2,1]

已知函数fx=cos(2x-π/3)+2sin(x-π/4)sin(x+π/4)

f(x)=cos(2x-π/3)+2sin(x-π/4)sin(x+π/4)=cos(2x-π/3)+2sin(x-π/4)cos[π/2-(x+π/4)]=cos(2x-π/3)+2sin(x-π/

若函数FX=2sin*2X-2根号3sinXsin(X-π/2)能使不等式|FX-M|

化简得到f(x)=2sin(2x-%pi/6)+1x属于(0,2%pi/3),所以f(x)属于(0,3]已知M-2

已知函数fx=(1+1/tanx)sin^x-2sin(x+π/4)sin(x-π/4)

f(x)=(1+1/tanx)*(sinx)^2-2sin(x+π/2)sin(x-π/4)=(1+cosx/sinx)*(sinx)^2+2sin(x+π/4)cos[(x-π/4)+π/2]=(s

函数fx=cos(2x-π/3)+2sin(x-π/4)sin(x+π/4)

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

已知函数fx=2sin(wx+

第一题A.第二题B

已知函数fx=2sin(π-x)cosx

你的分析前一半是对的,一直到“那么2x的单调增区间是[-4分之π,4分之π]”.2x的单调递增区间是[-π/2,π/2],x的才是[-π/4,π/4].所以函数在x=-π/3处取得最小值为-2分之根号

1.已知函数fx=sin(2x+φ)(0

(1)fx=sin(2x+φ)经过点(π/12,1)sin(π/6+φ)=1∴π/6+φ=π/2+2kπ,k∈Z∴φ=π/3+2kπ,k∈Z∵0

已知函数fx=sin(2x+3分之π)

解答;f(x)=sin(2x+3分之π)∴sin(2x+π/3)=-3/5∵x∈(0,π/2)∴2x+π/3∈(π/3,4π/3)∵sin(2x+π/3)

已知函数fx=sin(2x+π/3)(1)求函数y=fx的

解1当2kπ-π/2≤2x+π/3≤2kπ+π/2,k属于Z时,y是增函数即2kπ-5π/6≤2x≤2kπ+π/6,k属于Z时,y是增函数即kπ-5π/12≤x≤kπ+π/12,k属于Z时,y是增函数

化简函数fx=sin(2x+π/6)+2sin^2x

f(x)=sin(2x+π/6)-cos2x+1所以为2π/2=πf(x)=根号3/2sin2x-(cos2x)/2+1=sin(2x-π/6)+1所以最大值为2,x=π/2+2kπ-π/6=π/3+