sinb=msin(2a+b)求证:tan(a+b)=(1+m/1—m)*tanaxiexie

问题描述:

sinb=msin(2a+b)求证:tan(a+b)=(1+m/1—m)*tana
xiexie

sin(a+b-a)=msin(a+b+a)
sin(a+b)cosa-cos(a+b)sina=msin(a+b)cosa+mcos(a+b)sina
(1-m)sin(a+b)cosa=(m+1)cos(a+b)sina
tan(a+b)=(1+m)/(1-m)8tana