the `acos` function returns the arc cosine of x in radians.
you must include the math header to use the `acos` method.
call `acos` with a value between negative one and one.
the argument passed to `acos` must be in the range [-1, 1].
this library calculates the angle by applying the `acos` operation.
use the `acos` function to determine the angle from the cosine value.
the output of `acos` represents an angle in the range [0, pi].
many programs import `acos` directly from the standard math module.
the variable result stores the value returned by the `acos` call.
input values greater than 1 will cause the `acos` function to fail.
we used `acos` to solve the geometry problem regarding triangles.
the inverse cosine is calculated using the `acos` command in this language.
the `acos` function returns the arc cosine of x in radians.
you must include the math header to use the `acos` method.
call `acos` with a value between negative one and one.
the argument passed to `acos` must be in the range [-1, 1].
this library calculates the angle by applying the `acos` operation.
use the `acos` function to determine the angle from the cosine value.
the output of `acos` represents an angle in the range [0, pi].
many programs import `acos` directly from the standard math module.
the variable result stores the value returned by the `acos` call.
input values greater than 1 will cause the `acos` function to fail.
we used `acos` to solve the geometry problem regarding triangles.
the inverse cosine is calculated using the `acos` command in this language.
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