2tan^2(x/2)+2=4tan(
2tan^2(x/2)+2=4tan(
∫ ( tan^2 x + tan^4 x )dx
求不定积分∫(tan^2x+tan^4x)dx
证明 tan(nA/2)tan(nB/2)+tan(nB/2)tan(nC/2)+tan(nA/2)tan(nC/2)=
2(tan a+tan b)
1)tan(x/2+π/4)+tan(x/2-π/4)=2tanx
求证:tan(x/2+派/4)+tan(x/2-派/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
函数f(x)=tan(x+1)+tan(x+2)+tan(x+3)+.+tan(x+2013)图像的一个对称中心为?
tanx+tan(π/2 -x)=?