tanb=tan(180-a-c)=-tan(a+c)=-(tana+tanc)/(1-tanga*tanc)因为tana+tanb+tanc=3倍根号下3,所以tanb=-(3倍根号下3-tanb)/(1-tanga*tanc)因为tanb*tanb=tana*tanc,所以tanb=-(3倍根号下3-tanb)/(1-tanb*tanb),解得tan...