acos(-1.0000000)=
3.1416(rad)=
180.0004°=
180°00'01"
acos(-0.9982541)=
3.0825(rad)=
176.6142°=
176°36'51"
acos(-0.9965082)=
3.0580(rad)=
175.2105°=
175°12'37"
acos(-0.9947623)=
3.0392(rad)=
174.1333°=
174°07'59"
acos(-0.9930164)=
3.0233(rad)=
173.2223°=
173°13'20"
acos(-0.9912705)=
3.0094(rad)=
172.4259°=
172°25'33"
acos(-0.9895246)=
2.9967(rad)=
171.6983°=
171°41'53"
acos(-0.9877787)=
2.9851(rad)=
171.0336°=
171°02'00"
acos(-0.9860328)=
2.9743(rad)=
170.4148°=
170°24'53"
acos(-0.9842869)=
2.9641(rad)=
169.8304°=
169°49'49"