(2/tanx)*[1+(tanx)*tan(x/2)] 怎么化简
(2/tanx)*[1+(tanx)*tan(x/2)] 怎么化简
sec x-tanx怎么能化简成2/(1+tan(x/2)),
求(tan^2x-tanx+1)/(tan^2x+tanx+1)的最大值和最小值
求函数y=tan^2-tanx+1/tan^x+tanx+1的值域谢谢了,
∫(tanx)^2*(secx)^2*(secx)^2x*dx=∫(tanx)^2*(1+tan)^x*dtanx是怎么
(tanx+1/tanx)cos^2 x等于
tanx+tan(π/2 -x)=?
tan(x/2)=2.求tanx
求证:(sin2x)(1+tanx*tan(x/2))/2cosx=tanx
tanX+tanX=2tanX还是等于tan^2X.谢
当X等于多少时,(tan^2x-tanx+1)/(tan^2x+tanx+1)有最大值?
y=tan^2x+tanx+1的值域