ACOS() - Arccosine Trigonometric Value

Q

How to calculate the arccosine value of a given value using the ACOS() function?

✍: FYIcenter.com

A

ACOS(X) is a MySQL built-in function that calculates the arccosine value of a given value. For example:

SELECT ACOS(0), ACOS(1), ACOS(2);
  -- +--------------------+---------+---------+
  -- | ACOS(0)            | ACOS(1) | ACOS(2) |
  -- +--------------------+---------+---------+
  -- | 1.5707963267948966 |       0 |    NULL |
  -- +--------------------+---------+---------+

Reference information of the ACOS() function:

ACOS(X): val
  Returns the arc cosine of X, that is, the value whose cosine is X.
  Returns NULL if X is not in the range -1 to 1.

Arguments, return value and availability:
  X: Required. The input value.
  val: Return value. The arccosine value of the input value.
  Available since MySQL 4.0.

Related MySQL functions:

COS() - Cosine Trigonometric Value

⇒ ASIN() - Arcsine Trigonometric Value

⇐ ABS() - Absolute Value

⇑ MySQL Functions on Numeric Values

⇑⇑ MySQL Function References

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