P(-√3,y)所以r=√(x²+y²)=√(y²+3)所以sinα=y/r=y/√(y²+3)=y(√2/4)所以1/√(y²+3)=√2/4=1/√8r=√(y²+3)=√8y²=5y=±√5所以cosα=x/r=-√3/√8=-√6/4tanα=sinα/cosα=-...