sin(x) cos(x) tan(x) cot(x) sec(x) csc(x) arcsin(x) arccos(x

sin(x) cos(x) tan(x) cot(x) sec(x) csc(x) arcsin(x) arccos(x f(x)=|sin x+cos x+tan x+cot x+sec x+csc x|最小值 f(x)=|sin x+cos x+tan x+cot x+sec x+csc x|最小值答对马上采纳, 证明(tan^2x-cot^2x)/(sin^2x-cos^2x)=sec^2x+csc^2x 证明(tan^2x-cot^2x)/(sin^2x+cos^2x)=sec^2x+csc^2x arcsin|x|>arccos|x| 求sin^2(x)+tan^2(x)+csc^2(x)+sec^2(x)+cos^2(x)+cot^2(x)=31里,x tan x /(1-cot x) + cot x /(1-tanx) = 1+ sec x csc x 简化三角函数:csc(x)/sin(x)-(cot(x)csc(x))/sec(x) 谁能帮我解一下“tan x + cot x = sec x csc x” 已知函数f(x)=sin^2x+csc^2x+cos^2x+sec^2x+tan^2x+7cot^2x,x∈(0,π/4 如果y=|sin x+cos x+tan x+cot x+sec x+cscx| 那么y的最小值是多少?