| ACOS |
ACOS(n) |
Returns the
arc cosine of a value between -1 and 1. This function reverses the
output of the COS function. The result is an angle expressed in
radians, which will fall between inclusively in the range
to 
.
Example
SQL> SELECT ACOS(-1), ACOS(0), ACOS(1) 2 FROM dual; ACOS(-1) ACOS(0) ACOS(1) ---------- ---------- ---------- 3.14159265 1.57079633 0
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