Syntax
acos(cosine)
Parameters
| Parameter | Description |
|---|---|
| cosine | Required. A number in the range -1 to 1. If x is not a number, it returns a TypeError |
Description
The acos() method returns the arc cosine value of a number.
Note: The parameter passed in acos() must lie between -1 to 1.
Tip: acos(-1) will return the value of PI.
Example
print(acos(0.55)) print(acos(-0.55)) print(acos(0)) print(acos(1)) print(acos(-1)) 0.9884320889261531 2.15316056466364 1.5707963267948966 0.0 3.141592653589793