csc^2x=cot^2 1

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已知函数f(x)=sin^2x+csc^2x+cos^2x+sec^2x+tan^2x+7cot^2x,x∈(0,π/4

利用公式sec^2x=1+tan^2x,csc^2x=1+cot^2x,sin^2x+cos^2x=1f(x)=sin^2x+csc^2x+cos^2x+sec^2x+tan^2x+7cot^2x=s

f(x)=|sin x+cos x+tan x+cot x+sec x+csc x|最小值

f(x)=|sinx+cosx+tanx+cotx+secx+cscx|=|(sinx+cscx)+(cosx+secx)+(tanx+cotx)|∵sinx+cscx≥2√(sinx·cscx)=2

求sin^2(x)+tan^2(x)+csc^2(x)+sec^2(x)+cos^2(x)+cot^2(x)=31里,x

sin^2(x)+tan^2(x)+csc^2(x)+sec^2(x)+cos^2(x)+cot^2(x)=31得cos^2(x)+sin^2(x)+tan^2(x)+csc^2(x)+sec^2(x

csc(-x)=

csc(-x)=1/sin(-x)=-cscx

tan x /(1-cot x) + cot x /(1-tanx) = 1+ sec x csc x

tanx/(1-cotx)+cotx/(1-tanx)=tanx/(1-cosx/sinx)+cotx/(1-sinx/cosx)=sinxtanx/(sinx-cosx)+cosxcotx/(cos

(tanα+cotα)/ (secα*cscα)=?

(secα)的平方加上(cscα)的平方利用x,y,r的关系式就推出来了

tanα+cotα=secα·cscα

tanα+cotα=(sinα/cosα)+(cosα/sinα)=[(sinα)^2+(cosα)^2]/sinαcosα=secαcscα

微积分方程求解e^x + (e^x cot y + 2y csc y)y' = 0

大致能看清楚吧,就是把原式转化成e^xsinydx+(e^xcosy+2y)dy=o这个全微分方程,然后用全微分方程的方法做,答案是e^xsiny+y^2=C

谁能帮我解一下“tan x + cot x = sec x csc x”

tanx+cotx=sinx/cosx+cosx/sinx=(cosx平方+sinx平方)/(sinxcosx)=1/(sinxcosx)=secxcscx(注意sinx方+cosx方=1)

tanθ+cotθ=3,则tan^2θ+secθcscθ+cot^2θ的值为

tanθ+cotθ=3(tanθ+cotθ)^=tan^2θ+2+cot^2θ=9tan^2θ+2+cot^2θ=7secθcscθ=1/(sinθcosθ)=sin^2θcos^2θ/sinθcos

简化三角函数:csc(x)/sin(x)-(cot(x)csc(x))/sec(x)

csc(x)/sin(x)-(cot(x)csc(x))/sec(x)=1/sin²(x)-sin(x)/cos(x)*1/sin(x)*cos(x)=1/sin²(x)-1=(1

证明(tan^2x-cot^2x)/(sin^2x-cos^2x)=sec^2x+csc^2x

左边=(sin²x/cos²x-cos²x/sin²x)/(sin²x-cos²x)=[(sin^4x-cos^4x)/cos²x

证明(tan^2x-cot^2x)/(sin^2x+cos^2x)=sec^2x+csc^2x

sin^2x+cos^2x=1所以左边=tan^2x-cot^2x=sin^2x/cos^2x-cos^2x/sin^2x=(sin^4x-cos^4x)/sin^2xcos^2x=(sin^2x+c

csc,sec,cot是什么

cot是余切cot=cos/sinsec叫正割,sec=1/coscsc叫余割,csc=1/sin

cot x=1/2 0〈X〈90度 求 sin x ,cosx ,tanx,sec x,csc x 等于多少

可以构造一个直角三角形,其中C=90度设cotx=BC/AC=1/2,则:AB=根号5因为:0

sinx=根号3/2 90〈X〈180度 求 cos x ,tan x ,cot x,sec x,csc x 等于多少

cosx=±√[1-(sinx)^2]=±1/2∵90〈X〈180度∴cosx=-1/2tanx=sinx/cosx=-√3cotx=cosx/sinx=-√3/3secx=1/cosx=-2cscx

f(x)=|sin x+cos x+tan x+cot x+sec x+csc x|最小值答对马上采纳,

该氮化钽,cotx,secx,CSCX所有与sinx,而且cosx更换,太:Y=6+cosx+(1+sinx的+cosx)/(sinxcosx)记得T=sinx的+cosx,然后2sinxcosx=(

设y=(tan^2 x-csc^2 x )/(tan^2 x+cot^2 x -1) (a)证明y=1- 2/(tan^

1.y=(tan^2x-csc^2x)/(tan^2x+cot^2x-1)=(sin^2x/cos^2x-1/sin^2x)/(sin^2x/cos^2x+cos^2x/sin^2x-1)=(sin^