解:m*n=√3sinA-cosA=1. 2(√3sinA-1/2cosA)=1. 2(sinAcos30°-cosAsin30°)=1. sin(A-30°)=1/2 sin(A-30°)=sin30°. A-30°=30°.∴ A=60°
m*n=√3sinA+cosA=√3∴2sin(A+30°)=√3∴A+30°=60°或A+30°=120°即A=30°或A=90°(舍去)