函数f(x)=根号3sin2x cos2x
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注:题中f(x)=(√3)sin2x-2sin²x-1 解.(1)f(x)=(√3)sin2x-2sin²x-1 =(√3)sin2x+cos2x-2 =2sin(2x+π/
f(x)=1+cos2x+根号3sin2x+a=2sin(2x+π/6)+a+11、若f(x)max=2,则sin(2x+π/6)=1,即2+a+1=2,得a=-12、正弦的单调减区间在第二和第三象限
f(x)=2根号3sin方x+sin2x+根号3=根号3(2sin方x+1)+sin2x=根号3(1-cos2x+1)+sin2x=2根号3-根号3cos2x+sin2x=2sin(2x-60度)+2
f(x)=sin2x-2√3(cosx)^2+√3=sin2x-√3(1+cos2x)+√3=sin2x-√3cos2x=2sin(2x-π/3)π/4=再问:π/6=
已知函数f(x)=根号3sin2x+cos2x+21求f(x)的最大值及f(x)取得最大值时自变量x集合f(x)=根号3sin2x+cos2x+2=2[(根号3/2)sin2x+(1/2)cos2x]
f(x)=√3sin²2x+sin2xcos2x+t=(1/2)sin4x-(√3/2)cos4x+√3/2+t=sin(4x-π/3)+√3/2+t周期T=2π/4=π/2递增区间:-π/
ab=√3(sin2x)^2+cos2xsin2x=(√3/2)(1-cos4x)+(1/2)sin4x=(√3/2)+sin4xcos兀/3-cos4xsin兀/3=(√3/2)+sin(4x-兀/
TT表示"派"f(x)=根号3si2x*sin2x+sin2x*cos2x+t=根号3(1-cos4x)/2+sin4x*1/2+t=sin(4x-TT/3)+根号3/2+t最小正周期=2TT/4=T
一样是先化简的问题f(x)=2cos^2x+√3*sin2x-1=2(cosx)^2-1+√3*sin2x=cos2x+√3*sin2x=2(1/2*cos2x+√3/2*sin2x)=2(sinπ/
f(x)=2(cosx)^2+√3(sin2x)=1+2sin[2x+(π/6)].(1)∵x∈[0,π],∴2x+(π/6)∈[π/6,13π/6],∴递增区间[0,π/6]和[2π/3,π].(2
1,f(x)=√3sin2x+cos2x+1-m=2sin(2x+π/6)+1-m.若0再问:2A+π/6=π/2,为什么不行再答:sin(2A+π/6)=1/2,怎么可能是2A+π/6=π/2呢?再
f(x)=2(1/2sin2x-√3/2cos2x)=2(sin2xcosπ/3-cos2xsinπ/3)=2sin(2x-π/3)最小正周期为2π/2=π值域[-2,2}
答:f(x)=sin2x+√3cos2x-1=2*[(1/2)sin2x+(√3/2)cos2x]-1=2sin(2x+π/3)-1最小正周期T=2π/2=π0
1).f(x)=(√3)sin2x+cos2x+2=2sin(2x+π/6)+2单增区间[-π/3+kπ,π/6+kπ](2)f(C)=2sin(2C+π/6)+2=3,故C=π/3a/b=sinA/
(1)f=[根号3]/2sin2x-cos^2(x)-1/2=√3/2*sin2x-1/2(1+cos2x)-1/2=√3/2sin2x-1/2cos2x-1=sin(2x-π/6)-1∵x∈[-π/
1∵点p(1,-根号3)在角a的终边上,∴tana=-√3∴f(a)=√3sin2a-2sin²a=(2√3sinacosa-2sin²a)/(sin²a+cos
(1)、f(x)的定义域为sinx≠0,即x≠kπ;如果定义x=kπ时f(x)等于-1,可将定义域扩大至整个实数域;f(x)=[2√3sinxcosx-2cos²x]+1=√3sin2x-c
f(x)=(根号3/2)sin2x-cos^2x+1/4=(根号3/2)sin2x-(2cos^2x-1)/2+3/4=(根号3/2)sin2x-(cos2x)/2+3/4=sin((2x-π/6))