tanx+tan(π/2 -x)=?
tanx+tan(π/2 -x)=?
证明sec x+tanx=tan(π/4 +x/2)
证明tanx+1/cosx=tan(x/2+π/4)
tan(x/2)=2.求tanx
1)tan(x/2+π/4)+tan(x/2-π/4)=2tanx
tan(X/2+π/4)+tan(x/2-π/4)=2tanx?
tan( x/2+π/4)+tan(x/2-π/4 )=2tanx
tan(x/2+ π4)+tan(x/2- π/4)=2tanx
求函数y=tan^2-tanx+1/tan^x+tanx+1的值域谢谢了,
tanX+tanX=2tanX还是等于tan^2X.谢
证明下列恒等式(1)tan(x/2+π/4)+tan(x/2-π/4)=2tanx
已知X属于[-π/3,π/4]求函数y=tan平方X +2tanx