1)Sin x =1/2 2)sin x = -1/2 3)cos x =1/2 4)cos x = -1/2 5)Sin x =√2/2 6)sin x = -√2/2 6)cos x =√2/2 7)cos x =-√2/2 8)sin x =-√3/2 9)sin x =√3/2 10)sin x =√3/2 11)cos x = √3/2 12)cos x= -√3/2