已知3tana=2tan(a+b),求证:sin(2a+b)=5sinb

求证sin与tan 已知3sinB=sin(2A+B),求证tan(A+B)=2tanA 已知3sin b=sin(2a+b) 求证tan(a+b)=2tana 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 已知tan(A+B)=2tanA,求证3sinB=sin(2A+B) 已知sin(2a+B)=2sinB,求证tan(a+B)=3tana 已知：3sinb=sin(2a+b),求证：tan(a+b)=2tana 已知sin(2a+b)=5sinb,求证：2tan(a+b)=3tana 已知3tana=2tan(a+b),求证:sin(2a+b)=5sinb 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A、B是锐角,求证(tan(π+A)+tan(-B))/(1/tan(3π-A)+tan(π/2-B))=tanA*tanB 已知A、B是锐角,求证(tan(π+A)+tan(-B))/(1/tan(3π-A)+tan(π/2-B))=tanA*tanB 已知tan(a-r)/tana+sin^2b/sin^2a=1 ,求证tan^2b=tana*tanr.. 已知2tanA=3tanB,求证tan（A-B)=sin2B/5-cos2B. 已知2tanA=3tanB,求证tan(A-B)=sin2B/5-cos2B 已知：tan(a-b)=sin2a/(5-coa2b),求证2tana=3tanb 已知2tanA=3tanB.求证:tan(A-B)=sin2B/5-cos2B 已知tan(A-B)=sin2B/(5-cos2B) 求证:2tanA=3tanB