已知tan^2A=2tan^B+1,求证sin^2B=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tan(a-r)/tana+sin^2b/sin^2a=1 ,求证tan^2b=tana*tanr..
求解 已知 sin(a+b)=1/2 ,sin(a_b)=1/3,求证:tan a=5tan b
已知tan(A-B)/tanA+sin^2C/sin^2A=1,求证:tanA*tanB=tan^2C
求证sin与tan 已知3sinB=sin(2A+B),求证tan(A+B)=2tanA
tan^2a =2tan^2b+1 求证 cos2a +sin^2b=0
已知sin(a+b)=1,求证:tan(2a+b)+tanb=0
已知sin(a+b)=1,求证tan(2a+b)+tanb=0,
在锐角△ABC中,已知sin(A+B)=3/5,且sin(A-B)=1/5,求证:tan A=2tan B
已知5sinb=sin(2a+b) 求证 tan(a+b)/tana=3/2