设函数fx=根号三cos^2Ωx
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f(x)=2(cosx)^2+√3*sin2x[利用cos2x=2(cosx)^2-1化简]=1+cos2x+√3*sin2x=1+2[(1/2)*cos2x+(√3/2)*sin2x]=1+2[si
f(x)=2cos²x+2√3sinxcosx=1+cos(2x)+√3sin(2x)=2[(√3/2)sin(2x)+(1/2)cos(2x)]+1=2sin(2x+π/6)+1当sin(
f(x)=√3sin2x+cos2x=2(sin2x*√3/2+cos2x*1/2)=2(sin2xcosπ/6+cos2xsinπ/6)=2sin(2x+π/6)所以f(π/6)=2sin(2×π/
你确定是5sinx-cosx不是5sinxcosx?如果是5sinxcosx,那么f(x)=5sinxcosx-5√3cos^2x=5sin2x/2-5√3[(1+cos2x)/2]=5sin2x/2
1)f(x)=sin(x/2)cos(x/2)+√3cos²(x/2)=(sinx)/2+(√3cosx)/2-1/2令cos(π/3)=1/2sin(π/3)=√3/2∴f(x)=sin(
先化简f(x)=2根号3sinxcosx+2cos^2x-1=根号3sin2x+cos2x=2(根号3/2sin2x+1/2cos2x)=2sin(2x+π/6)则T=2π/ω=2π/2=πy=sin
fx=2cos^2x+2根号3sinxcosx-1=2cos^2x-1+2根号3sinxcosx根据倍角公式,sin2α=2sinαcosαcos2α=2cos^2(α)-1fx=cos2x+根号3s
fx=sin2x-根号3*(1+cos2x)+a+根号3=2sin(2x-60°)+aT=pi,增区间[k*pi-pi/6,k*pi+5pi/12],k属于Z 2.由题意得-5pi/6<
(1)f(x)=√3sinx·cosx+cos²x+2m-1=1/2*(√3*2*sinx·cosx+2cos²x)+2m-1=1/2*(√3*sin2x+cos2x+1)+2m-
f(x)=cos(2x-4π/3)+2cos^2x=cos(2x-4π/3)+cos2x+1=2cos(2x-2π/3)cos2π/3+1=1-√3cos(2x-2π/3)1.当cos(2x-2π/3
再答:这是高一的题目吧再答:不谢,复习加油
F(X)=cos(√3x+t)F'(X)=-√3sin(√3x+t)F(X)+F'(X)=cos(√3x+t)-√3sin(√3x+t)是奇函数所以F(0)+F'(0)=0即cost-√3sint=0
f(x)=根号3/2*sin2x-1/2cos2x=cospi/6sin2x-sinpi/6cos2x=sin(2x-pi/6)f(0)=-1/2f(pi/4)=根号3/2函数值的范围[-1/2,根号
1.f(x)=√3sinxcosx-cos²x+1/2=(√3/2)(2sinxcosx)-(1/2)(2cos²x-1)二倍角公式:2sinxcosx=sin(2x),2cos&
f(x)=2cos²(x/2)-√3sinxf(x)=2cos²(x/2)-2√3sin(x/2)cos(x/2)f(x)=2cos(x/2)[cos(x/2)-√3sin(x/2
f(x)=√3cos²x+sinxcosx-√3/2=√3(cos2x+1)/2+sin2x/2-√3/2=√3/2cos2x+√3/2+1/2sin2x-√3/2=1/2sin2x+√3/
设函数fx=2cos^2(π/4-x)+sin(2x+π/3)-1=cos(PI/2-2x)+sin(2x+PI/3)=sin(2x)+sin(2x)/2+cos(2x)*sqrt(3)/2=sqrt
f(x)=2sinx/2cosx/2√3cosx=sin(x/2x/2)√3cosx=sinx√3cosx=√(1^2√3^2)sin(xπ/3)=2sin(xπ/3)函数f(x)的最小正周期T=2π
3sinx+cos(π/3+x)=3sinx+1/2cosx-v3/2sinx=(3-v3/2)sinx+1/2cosx根据公式asinx+bcosx=v(a^2+b^2)sin(x+θ)v[(3-v
(1)∵cos2x=2cos^2x-1∴f(x)=1/2+cos(2x+π/6)/2对称轴2x0+π/6=π+2kπx0=5π/12+kπg(x0)=1+1/2sin(5π/6+2kπ)=5/4(2)