x=-√3,y=m所以r=√(3+m²)所以sina=y/r=m/√(3+m²)=√2*m/4所以√2*√(3+m²)=42(m²+3)=16m²=5m=±√5所以sina=±√10/4cosa=x/r=-√3/8tana=sina/cosa所以sina=√10/4,则tana=-2√30/3sina...