已知sin（a+b）=1 则tan（2a+b）+tanb

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已知sin（a+b）=1则tan（2a+b）+tanb已知sin（a+b）=1则tan（2a+b）+tanb已知sin（a+b）=1则tan（2a+b）+tanb4tan(a/2)=1-tan(a/2

已知sin（a+b）=1 则tan（2a+b）+tanb
已知sin（a+b）=1 则tan（2a+b）+tanb

已知sin（a+b）=1 则tan（2a+b）+tanb
4tan(a/2)=1-tan(a/2)得 2tan(a/2)/(1-tan(a/2))=1/2
tan(a)=1/2
4sinb=sin(2a+b)+sinb=2sin(a+b)cos(a)
2sinb=sin(2a+b)-sinb=2cos(a+b)sin(a)
相除得2tan(a)=tan(a+b)=1 a+b=π/4

已知sin（a+b）=1 则tan（2a+b）+tanb 已知 tan a =1 3sin(a+b)=sin(2a+b) ,求 tan(a+b) 的值. 已知sin(A+B)=3/5,sin(A-B)=1/5,证明：tan A=2tan B. 已知sin（2a+b）=3sin（b）求tan（a+b）/tan(a)的值已知sin(a+b)=2/3,sin(a-b)=3/4,求[tan(a+b）-tana-tanb]/tan²b*tan(a+b)的值已知sin(A+B)=1则tan(2A+B)+tanB=? 已知sin（2a-b）=3sinb,则tan（a-b）/tana 求解已知 sin(a+b)=1/2 ,sin(a_b)=1/3,求证:tan a=5tan b求解:已知 sin(a+b)=1/2 ,sin(a_b)=1/3,求证:tan a=5tan b 已知(tan^2)a=2(tan^2)B+1,求证：(sin^2)B=2(sin^2)A-1 已知tan^2A=2tan^B+1求证sin^2B=2sin^2A-1救急已知tan^2a=2tan^2b+1,求证:sin^b=2sin^2a-1 已知tan^2A=2tan^B+1,求证sin^2B=2sin^2A-1 已知sin^2B=2sin^2A-1求证tan^2A=2tan^B+1 已知tan^2 a=2tan^ B +1,求证sin^2 b=sin^2 a -1 已知tan²a=2tan²b+1,求证sin²b=2sin²a-1 已知tan²a=2tan²B+1,求证sin²B+1=2sin²a 已知tan²a=2tan²b+1,求证sin²b+1=2sin²a 已知tan(a-r)/tana+sin^2b/sin^2a=1 ,求证tan^2b=tana*tanr..