已知a、b为锐角,a+b≠π/2,且满足3sinb=sin(2a+b)

已知a、b为锐角,a+b≠π/2,且满足3sinb=sin(2a+b) 已知A,B是锐角,A+B≠π/2,且满足3sinB=sin(2A+B)求证tanB≤2^(1/2)/4 已知A,B是锐角,A+B≠π/2,且满足3sinB=sin(2A+B),求证tanB≤(2^0.5)/4 已知3sinb=sin(2a+b)且tana=1,求tan(a+b). a,b为锐角,3sina+3sinb=1 ,3sin(2a)-2sin(2b)=0 求sin(a+2b) 已知：锐角A,B满足cos(A+B)=1/2,sin(A-B)=1/3,求cos2A 已知sinA=3/5 sinB=1/2 A、B均为锐角 求sin(2A+2B)的值 已知a,b均为锐角,且3sin^2a+2sin^2b=1,3sin2a-2sin2b=0,求a+2b? 已知cosa=1/7,cos(a+B)=-11/14,且a,B均为锐角.求sinB,cos(2a+B) 已知a,b是锐角,且满足sinb=sinacos(a+b),若a+b=π/4,则tanb= 已知A,B为锐角且3(sinA)^2+2(sinB)^2=1,3sin2A-2sin2B=0.求证：A+2B=90度 已知tan(3.14+a)=-1/3,若a是钝角,a-b是锐角,且sin(a-b)=3/5,求sinb