fx=2根号3sin(派-x)-(sinx-cos)*2
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f(x)=√3sin²x+sinxcosx=√3[(1-cos2x)/2]+1/2sin2x=1/2sin2x-√3/2cos2x+√3/2=sin(2x-π/3)+√3/2∵x∈[π/2,
f(x)=2根号3sin(x/2+派/4)cos(x/2+派/4)-sin(x+派).=(根号3)sin(x+π/2)-sin(x+π)=(根号3)cosx+sinx这一步用到诱导公式=2*((根号3
再答:亲,满意请采纳再问:谢谢亲再问:再问:可以帮我解决第二问吗再答:恩,我看下再问:麻烦了。O(∩_∩)O再答:再答:再问:谢谢亲再答:😊😊再问:美丽的姑凉谢谢你再答
f(x)=1+sin(派\2+x)-根号3sinx=1+cosx-根号3sinx=1+2cos(x+π/6)T=2π值域=[-1,3]再问:还有一个就是若α为第二象限角,且f(α-派\3)=1\3,求
原式=1/2sinx+根号3/2cosx+sinx-根号3cosx+根号3/2cosx-3/2sinx(先全部展开)=0(最后合并同类项得0)
2)f=1/2=sin(x)=kπ+π/6or2kπ+π/62n项和,可分奇数n项和偶数n项s奇=a1n+n(n-1)d/2=π*n/6+π*n(n-1)=π(n^2-5n/6)s偶=a1n+n(n-
f(x)=2根号3sin(x/2+派/4)cos(x/2+派/4)-sin(x+派).=√3sin(x+π/2)+sinx=sinx+√3cosx=2(1/2sinx+√3/2cosx)=2sin(x
当x=11π/4时,1/3x-π/6=3π/4所以,f(11π/4)=sin3π/4=二分之根号二希望我的答案能让您满意,如有不明白的地方,请继续发问
x属于(派/2,3派/4),X+派/4属于(3派/4,派),所以sin(X+派/4)=7√2/10.Sinx=sin[(X+派/4)-派/4]=sin(X+派/4)cos派/4-cos(X+派/4)s
才5分==再问:提高了再答:1、π;5/2,1/22、-π/12再问:第二个问能详解一下么?谢再答:奇函数的话就意味着有一个对称中心(0,0),这时是最小的
f(x)=√3asinx+bcos(x-π/3)f(x)图像过点(派/3,1/2),(7派/6,0)所以3/2*a+b=1/2-√3/2a-√3/2b=0解得:a=2+√3,b=-2-√3∴f(x)=
[sinx+cos(π+x)]/[sinx+sin(π/2-x)]=(sinx-cosx)/(sinx+cosx)=(tanx-1)/(tanx+1)=1-[2/(tanx+1)]sinx=√3/3∴
fx=2cosxsin(x+π/3)-√3sin^2x+sinxcosx+1=2cosx(√3/2cosx+1/2sinx)-√3sin^2x+sinxcosx+1=√3cos^2x-√3sin^2x
答:f(x)=2sin(x-π/3)cosx+sinxcosx+√3(sinx)^2=sin(x-π/3+x)+sin(x-π/3-x)+sinxcosx+(√3/2)(1-cos2x)=sin(2x
f(x)=1-cos(π/2+2x)-根号3cos2x=1+sin2x-根号3cos2x=1+2sin(2x-π/3)最大值3,最小值2
f(x)=√3sin(2x-π/6)-2cos²(x-π/12)+1=√3sin(2x-π/6)-cos(2x-π/6)=2{sin(2x-π/6)cosπ/6-cos(2x-π/6)sin
f(x)=2sin(x-π/6)cosx+2cos²x=(2sinxcosπ/6-2cosxsinπ/6)cosx+2cos²x=√3sinxcosx-cos²x+2co
f(x)=sinx-cosx=√2sin(x-4/π)(1).T=2π(2).f(x)max=√2f(x)min=-√2(3).sina+cosa=√2cos(a-π/4)cos(a-π/4)=√[1