UniBasic Commands Reference - Rocket Software

ACOS
Syntax
ACOS(expr)
Description
The UniBasic ACOS function returns the trigonometric arc cosine (inverse cosine)
of a numeric expression in degrees. expr must be a value between -1 and +1. ACOS
returns a value expressed as the degree of the arc cosine of the input, which ranges
from 0 to 180. If expr evaluates to a value outside the range of -1 to +1, UniData
displays an error message and returns 0 as the result.
With null value handling on, the result of any mathematical operation, function, or
comparison involving the null value is the null value. Therefore, ACOS returns the
null value when expr is the null value.
Examples
In the following example, the program statement assigns 60, the arc cosine of 0.5, to
ARCCOS:
ARCCOS = ACOS(0.5)
In the next example, the program statement prints out the arc cosine of -0.5, which is
120:
PRINT ACOS(-0.5)
Related Commands
ASIN, ATAN, COS, SIN, TAN
ACOS 1-77