ACOS

Syntax

ACOS(X)

Description

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.

Examples

SELECT ACOS(1); +---------+ | ACOS(1) | +---------+ | 0 | +---------+  SELECT ACOS(1.0001); +--------------+ | ACOS(1.0001) | +--------------+ | NULL | +--------------+  SELECT ACOS(0); +-----------------+ | ACOS(0) | +-----------------+ | 1.5707963267949 | +-----------------+  SELECT ACOS(0.234); +------------------+ | ACOS(0.234) | +------------------+ | 1.33460644244679 | +------------------+

_{This page is licensed: GPLv2, originally from fill_help_tables.sql}