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$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.

See Also