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# Import math Library import math # Return the arc cosine of numbers print(math.acos(0.55)) print(math.acos(-0.55)) print(math.acos(0)) print(math.acos(1)) print(math.acos(-1))
0.9884320889261531
2.15316056466364
1.5707963267948966
0.0
3.141592653589793