ACOS(X)
Purpose
Arccosine (inverse cosine) function.
Class
Elemental function
Argument type and attributes
X
must be of type real with a value that satisfies the inequality |X| <= 1.
Result type and attributes
Same as X.
Result value
It is expressed in radians, and approximates arccos(X).
It is in the range 0 <= ACOS(X) <=
PI
.
Examples
ACOS
(1.0) has the value 0.0.
Specific Name
Argument Type
Result Type
Pass As Arg?
ACOS
default real
default real
yes
DACOS
double precision real
double precision real
yes
QACOS
1
REAL(16)
REAL(16)
yes
QARCOS
1
REAL(16)
REAL(16)
yes
Notes:
IBM Extension.