sin 120 =sin 60=根号3/2
sin 150 =sin 30=1/2
sin 180 =0
cos 0 =1
30 =根号3/2
45 =根号2/2
65 =? 你要文的是60?=1/2
90 =0
120 =-1/2
150 =-根号3/2
180 =-1
tan 0 =0
30 =根号3/3
45 =1
60 =根号3
90 =不存在
120 =-根号3
150 =-根号3/3
180=0