tanX+tanX=2tanX还是等于tan^2X.谢
tanX+tanX=2tanX还是等于tan^2X.谢
(tanx+1/tanx)cos^2 x等于
tanx+tan(π/2 -x)=?
tan(x/2)=2.求tanx
(2/tanx)*[1+(tanx)*tan(x/2)] 怎么化简
求函数y=tan^2-tanx+1/tan^x+tanx+1的值域谢谢了,
当X等于多少时,(tan^2x-tanx+1)/(tan^2x+tanx+1)有最大值?
求证:(sin2x)(1+tanx*tan(x/2))/2cosx=tanx
﹙tanx+1/tanx)cos^2x等于
证明sec x+tanx=tan(π/4 +x/2)
tanX=4/3,tanX/2等于多少?
y=tan^2x+tanx+1的值域