角α终边上一点P(-√3,y)根据三角函数定义sinα=y/r又sinα=√3/4y∴y/r=√3/4y∴r=4/√3=4√3/3∵x^2+y^2=r^2∴3+y^2=48/9∴y^2=21/9y=±√21/3y=√21/3时∴sinα=√7/4 cscα=r/y=4√7/7cosα=x/r=-3/4 secα=x/r=...