知tan(A-B)/tanA+sin^2C/sin^2A=1求证tanAtanB=tan^2C

知tan(A-B)/tanA+sin^2C/sin^2A=1求证tanAtanB=tan^2C 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^2C 已知tan(A-B)/tanA+sin^2C/sin^2A=1,求证：tanA×tanB＝tan^C求证tanA×tanB＝tan^2C 已知3sin b=sin(2a+b) 求证tan(a+b)=2tana 求证sin与tan 已知3sinB=sin(2A+B),求证tan(A+B)=2tanA 已知sin(A+B)=2/3,sin(A-B)=3/4,求(tan(a+b)-tana-tanb)/(tan^2b*tan(a+b))帮下忙 已知sin(a+b)=2/3,sin(a-b)=3/4,求[tan(a+b）-tana-tanb]/tan²b*tan(a+b)的值 A B 为锐角tan(A-B)=sin(2B),求证2tan(2B)=tanA+tanB tan(a+b)=3tana 证明2sin2b-sin2a=sin(2a+2b) 若tan(A+B)=2tanA,求证3sinB=sin(2A+B) 已知3sinB=sin(2A+B),求证tan(A+B)=2tanA 已知5sinb=sin(2a+b) 求证 tan(a+b)/tana=3/2 若tan(A+B)=2tanA.求证3sinB=sin(2A+B), 已知3Sin2b=sin(2a+b)证明:tan(a+b)=2tana 若tan(a+b)=2tana,求证：3sinb=sin(2a+b) 已知tan(A+B)=2tanA,求证3sinB=sin(2A+B) 已知sin(2a+B)=2sinB,求证tan(a+B)=3tana