y = sec (x) + csc (x) 求导,之后代入x = 3pi / 4 求值,要较详细步骤!如题无误!

y=sec^2x+csc^2x求导 sec x=?csc x=? 求证(csc x+cot x)/(sec x+tan x)=(sec x- tan x)/(csc x- cot x) y=sec^2(x/a)+csc^2(x/a)的导数怎么求?RT 化简：csc（x）-sec（x）= f(x)=|sin x+cos x+tan x+cot x+sec x+csc x|最小值 tan x /(1-cot x) + cot x /(1-tanx) = 1+ sec x csc x求证! 下面微分方程的通解是多少 sec^2X cotY dX - csc^2 Y tanX dY=0 谁能帮我解一下“tan x + cot x = sec x csc x” 证明sec^2 x + csc^2 x = sec^2 x × csc^2 x右边是相乘1 + 2 = 2 × 1 简化三角函数:csc(x)/sin(x)-(cot(x)csc(x))/sec(x) y=sec^2x+csc^2x求导是应该计算y'=sec^2xtan^2x·x'+（-cscx)^2·cotx^2·x'吗? 求sec X,和csc X相关的所有公式! y = sec (x) + csc (x) 求导,之后代入x = 3pi / 4 求值,要较详细步骤!如题无误! sec（x）csc（x）高数中怎么读sec（x）,csc（x）,还有求和符怎么读 f(x)=|sin x+cos x+tan x+cot x+sec x+csc x|最小值答对马上采纳, y=sec x 是什么 证明(tan^2x-cot^2x)/(sin^2x+cos^2x)=sec^2x+csc^2x