f(x)=2根号3sin(π-x)sinx-(sinx-cosx)^2

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f(x)=2根号3sin(π-x)sinx-(sinx-cosx)^2
f(x)=2sin^2(π/4-x)-2根号3cos^2x+根号3如题

二倍角公式:f(x)=1-cos(π/2-2x)-√3(1+cos2x)+√3=1-sin2x-√3cos2x=1-2sin(2x+π/3);最小正周期T=2π/2=π;递减区间即sin(2x+π/3

求化简f(x)=sin^2x+2根号3sin(x+π/4)cos(x-π/4)-cos^2x-根号3

利用三角函数积化和差公式sinAcosB=0.5[sin(A+B)+sin(A-B)]和倍角公式cos2A=cos²A-sin²A原式=sin²x+√3[sin2x+si

已知向量a=(根号2sin(4/π+x)+1,-根号3),b=(根号2sin(4/π+x)-1,cos2x函数f(x)=

是四份之π还是π分之四?再问:四分之π再答:你的题给的有点特殊,所以只能按照我理解的给答案,如果有错可以追问f(x)=ab={√2sin(π/4+x)+1}x{√2sin(π/4+x)-1}-√3co

已知f(x)=sin(2x+π/3)-根号3sin^2x+sinxcosx+根号3/2

由题意可得:f(x)=sin(2x+π/3)-√3sin^2x+sinxcosx+√3/2=sin(2x+π/3)-√3(1/2-1/2cos2x)+1/2sin2x+√3/2=2sin(2x+π/3

已知函数f(x)=2cosx*sin(x+π/3)-根号3/2

因为:函数f(x)=2cosx·sin(x+π/3)-√3(sinx)^2+sinx·cosx=2cosx·sin(x+∏/3)-√3(sinx)^2+sinx·cosx=2cosx·sinx·cos

设f(x)=2cosx.sin(x+π/3)-根号3 sin平方x+sinx.cosx

f(x)=2cosx*sin(x+π/3)-√3sinx^2+sinx*cosx=2cosx*(sinxcosπ/3+cosxsinπ/3))-√3sinx^2+sinx*cosx=sinxcosx+

函数f(x)的解析式为f(x)=sin(2x+π/3)-根号3sin²x+sinxcosx+根号3/2

利用反函数定义f//(1)=a表明f(a)=1即2sin(2a+π/3)=1sin(2a+π/3)=1/22a+π/3=2kπ+π/6或者2kπ+5π/6,k是整数即2a=2kπ-π/6或者2kπ+π

已知函数f(x)=2倍根号3sin²x-sin(2x-π/3)

(1)因为sin²x=(1-cos2x)/2,sin(2x-π/3)=1/2sin2x-根号3/2cos2x所以函数f(x)=2倍根号3sin²x-sin(2x-π/3)=-sin

求函数f(x)=2sin(π-x)sin(π/2-x)+2根号3sin^2x-根号3的单调递减区间

f(x)=2sinxcosx+2√3sin²x-√3=2sinxcosx+√3sin²x+√3(sin²x-1)=2sinxcosx+√3sin²x-√3cos

f(x)=2sinπ/4cosπ/4-2根号3sin^2π/4+根号3

f(x)=2sinπ/4cosπ/4-2√3sin²π/4+√3=sinπ/2+√3(1-2sin²π/4)=1+√3cosπ/2=1

已知函数f(x)=根号3sin(2x-π/6)+2sin的平方(x-π/12)(x∈R)(1)求函数f(x)

因为f(x)=根号3sin(2x-π/6)+2sin的平方(x-π/12)=根号3sin(2x-π/6)-(1-2sin的平方(x-π/12))+1=根号3sin(2x-π/6)-cos(2x-π/6

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

已知函数f(x)=sin2(x+π )+根号3sin(x+π )sin(π -x)-1 \2,求f(x)的最小正周期和f

f(x)=sin2(x+π)+根号3sin(x+π)sin(π-x)-1\2=sin2x-根号3sin²x-1/2=sin2x+根号3/2cos2x-1=根号7/2sin(2x+γ)-1co

已知函数f(x)=2cosx*sin(x+π/3)-根号3sin^2x+sinx*cosx

这个简单:f(x)=2cosx(sinxcos(pi/3)+cosxsin(pi/3))-根号33sin^2x+sinx*cosx=2sinxcosx+根号3cos2x=2sin(x+pi/3)所以:

f(x)=sin平方x+2根号3sin(x+π/4)cos(x-π/4)-cos平方x-根号3

前提掌握:sinx*sinx+cosx*cosx=1cos2x=2*cosx*cosx-1=1-2*sinx*sinxcos(x-π/4)=-sin(x-π/4+π/2)=-sin(x+π/4)sin

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

已知函数f(x)=2cosx*sin(x+π/3)-【根号3】/2

f(x)=sin(2x+π/3)(积化和差公式)所以最小正周期T=2π/2=π

已知函数f(x)=sin²ωx+根号3sinωx乘sin(ωx+π/2)+2cos²ωx,x∈R,(

(1)化解函数:√3∵f(x)=sin²wx+√3sinwxcoswx+2cos²wx=√3/2sin2wx+sin²wx+cos²wx+cos²wx

函数f(x)=2cosxsin(x+π/3)-根号3sin²x+sinxcosx

最大值2,最小值-2.通过化简,化成一个三角函数式,即可知道结果.请参考图片.