函数f(x)=根号三sinx sin(π 2+x)的最大值
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函数f(x)=sin(2x+φ)+根号三cos(2x+θ)=2sin(2x+θ+π/3)的定义域为:R则f(0)=0所以:0=sin(θ+π/3),=>θ+π/3=2kπ,k∈Z即θ=2kπ-π/3所
派再问:求过程再答:再答:给好评再问:三角形3边ABC满足B^2=AC求f(B的取值范围。。)再答:先给好评,立马帮你解决再答:应该是abc吧?再问:嗯。再问:?
1、f(x)=1/2*sin(2x/3)+√3*(1+cos2x/3)/2=1/2*sin(2x/3)+√3/2*cos(2x/3)+√3/2=sin(2x/3)cosπ/3+cos(2x/3)sin
f(x)=√3cos²0.5x+sin0.5xcos0.5x=√3/2(cosx+1)+1/2sinx=sin(60°+x)+√3/2若f(x)=3/5+√3/2,即sin(60°+x)+√
f(x)=√3(cos(x/2))^2+sin(x/2)cos(x/2)=(√3/2)(cosx+1)+(1/2)sinx=sin(π/6+x)+√3/2f(x)=3/5+√3/2sin(π/6+x)
f(x)=(1-cos2x)/2+(√3/2)sin2x+1/2=(√3/2)sin2x-(1/2)cos2x+1=sin(2x-π/6)+1(1)最小正周期T=2π/2=π(2)f(x)max=2,
f(x)=1/2cosx/2+√3/2sinx/2=sinx/2cosπ/6+cosx/2sinπ/6=sin(x/2+π/6)增函数就是-π/2再问:由原式得出的第一步和最后一步不懂,麻烦简单点教下
f(x)=√3/2sin2x-3/2cos2x=√3(1/2sin2x-√3/2cos2x)=√3sin(2x-π/3)f(x)最小正周期T=2π/2=π由2kπ-π/2≤2x-π/3≤2kπ+π/2
f(x)=cos(x/2)=√3sin(x/2)cos(x/2)+cos^2(x/2)=√3/2sinx+1/2(cosx+1)=√3/2sinx+1/2cosx+1=sinxcos(π/6)+cos
f(x)=根号3cos^x+sinxcosx-根号3/2=根号3*(1+cos2x)/2+sin2x/2-根号3/2所以f(派/8)=根号3*(1+cos派/4)/2+sin(派/4)/2-根号3/2
f(x)=(12)sin2x+√3cos²x=(1/2)sin2x+(√3/2)[1+cos2x]=(1/2)sin2x+(√3/2)cos2x+(√3/2)=sin(2x+π/3)+(√3
原式=sin2x/2+cosx^2根号3=1/2sin2x+根号3/2+根号3/2*cos2x=sin(2x+π/3)+根号3/2因为T=2π/ww=2所以T=π所以最小正周期为π
f(x)=2(√3/2sinx-1/2cosx)=2(sinxcosπ/6-sinπ/6cosx)=2sin(x-π/6)∵sinx在[-π/2+2kπ,π/2+2kπ]上递增∴x-π/6属于[-π/
f(x)=√3/2-√3sin²ωx-sinωxcosωx=√3/2(1-2sin²ωx)-1/2*2sinωxcosωx=√3/2*cos2wx-1/2sin2wx=cos2wx
f(x)等于根号三cos平方x+cosxf(x)=√3cos²x+cosx=√3(cos²x+√3/3cosx)=√3(cosx+√3/6)²-√3/12因为-1≤cos
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/
1、f(x)=sinx(sinx+√3cosx)=sin²x+√3sinxcosx=(1-cos2x)/2+(√3/2)sin2x=(√3/2)sin2x-(1/2)cos2x+1/2=si
cos(A-C)-cos(A+C),cosAcosC+sinAsinC-(cosAcosC-sinAsinC)=2sinAsinC=2sinB所以sinAsinC=sinBf(C)=2sin(2C+π
根据三角函数降幂公式,f(x)=sinx(√3sinx+cosx)=√3sinx+sinxcosx=√3(1-cos2x)/2+1/2sin2x=1/2sin2x-√3/2cos2x+√3/2=sin
f(x)=(sin²x+cos²x)+2cos²x+2√3sinxcosx-2=1+1+cos2x+√3sin2x-2=√3sin2x+cos2x=2sin(2x+π/6