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 证明(tan^2x-cot^2x)/(sin^2x+cos^2x)=sec^2x+csc^2x 求sin^2(x)+tan^2(x)+csc^2(x)+sec^2(x)+cos^2(x)+cot^2(x)=31里,x f(x)=|sin x+cos x+tan x+cot x+sec x+csc x|最小值 sinx=根号3/2 90〈X〈180度 求 cos x ,tan x ,cot x,sec x,csc x 等于多少 sin(x) cos(x) tan(x) cot(x) sec(x) csc(x) arcsin(x) arccos(x 已知函数f(x)=sin^2x+csc^2x+cos^2x+sec^2x+tan^2x+7cot^2x,x∈(0,π/4 f(x)=|sin x+cos x+tan x+cot x+sec x+csc x|最小值答对马上采纳, 谁能帮忙整理下sin x、cos x、tanx、cot x、tan x/2、sin 2x、cos 2x、sec x、cs 请问sin(x+π/2)=?cos(x+π/2)=?tan(x+π/2)=?cot(x+π/2)=?sec(x+π/2) cot x=1/2 0〈X〈90度 求 sin x ,cosx ,tanx,sec x,csc x 等于多少 化简sin(派-x)+sin(派+x)-cos(-x)+cos(2派-x)-tan(派+x)cot(派-x)