tana=0.5 tan(a-b)=-2/3求tan(b-2a)

tan(a+b)-1/tana=2*tana 请化简! tana=0.5 tan(a-b)=-2/3求tan(b-2a) tan(A+B)=tanA+tanB+tanAtanB? 已知锐角A.B满足tan(A+B)=2tanA,则tanA的最大值为? 已知tan(a-r)/tana+sin^2b/sin^2a=1 ,求证tan^2b=tana*tanr.. 已知tan(A-B)/tanA+sin^2C/sin^2A=1,求证：tanA×tanB＝tan^C求证tanA×tanB＝tan^2C tan(2a+b)=3,tan(a+b)=1,tana= tana=2/1.tan(a－B)=-5/2求.tan(B-a) , tana=2,tan(b-a)=3,则tan(b-2a) tan(a+b)=2/5,tan(a-b)=1/4,求tana,tanb,tan2a 证明 tana+tanb=tan(a+b)-tana *tanb *tan(a+b) 求证：化简[tan(A+B)-tanA-tanB]÷[tanA·tan(A+B)]=tanB.RT 已知tan(A-B)/tanA+sin^2C/sin^2A=1,求证：tanA*tanB=tan^2C 已知tana+tanb=2,tan(a+b)=4.则tana*tanb 已知tanA+tanB=2,tan(A+B)=4,且tanA 已知tana+tanb=2,tan(a+b)=4,tana 求证tan(A/2)-{1/(tanA/2)}=-2/tanA 求证tan(a/2)-1/(tana/2)=-2/tana