化简tan(18-x)tan(12+x)+根号3[tan(18-x)+tan(12+x)]
化简tan(18-x)tan(12+x)+根号3[tan(18-x)+tan(12+x)]
化简 tan(18°-x)tan(12°+x)+根号3乘[tan(18°-x)+tan(12°+x)]=
tan(x+45)-tan(45-x)=?
已知 Tan x=根号3,π
化简[sin(180+x)-tan(-x)+tan(-360-x)]/[tan(x+180)+cos(-x)+cos(-
化简tan45+x)-tan(45-x)/tan(45+x)+tan(45-x)
化简tan(3x/2)-tan(x/2)-sinx/(cos(3x/2)*cos(x/2))
tan(6/π--x)+tan(6/π+x)+根号三倍的tan(6/π--x)乘tan(6/π+x)化简求值
∫ ( tan^2 x + tan^4 x )dx
求不定积分∫(tan^2x+tan^4x)dx
化简:tan(x-60°)tanx+tanxtan(x+60°)+tan(x+60°)tan(x-60°),
化简 (sin(540°-x))/(tan(900°-x))*(1/(tan(450°-x)tan(810°-x))*(