$ZCOT
Cotangent function.
Synopsis
$ZCOT(n)
Parameter
| Argument | Description |
|---|---|
| n | An angle in radians. |
Description
$ZCOT returns the trigonometric cotangent of n. The result is a signed decimal number.
Parameter
n
An angle in radians, specified as a nonzero value. It can be specified as a value, a variable, or an expression. A value of 0 generates an <ILLEGAL VALUE> error. A non-numeric string is evaluated as 0.
Examples
The following example permits you to compute the cotangent of a number:
READ "Input a number: ",num
IF num=0 { WRITE !,"zero is an illegal value" }
ELSE {
WRITE !,"the cotangent is: ",$ZCOT(num)
}
QUIT
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The following example compares the results from InterSystems IRIS fractional numbers ($DECIMAL numbers) and $DOUBLE numbers:
WRITE !,"the cotangent is: ",$ZCOT(1.0) WRITE !,"the cotangent is: ",$ZCOT($DOUBLE(1.0)) WRITE !,"the cotangent is: ",$ZCOT(-1.0) WRITE !,"the cotangent is: ",$ZCOT($DOUBLE(-1.0)) WRITE !,"the cotangent is: ",$ZCOT($ZPI/2) WRITE !,"the cotangent is: ",$ZCOT($DOUBLE($ZPI)/2)
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Note that the cotangent of pi/2 is a fractional number, not 0.