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Table of Contents

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  1. Preface
  2. Understanding Data Types and Field Properties
  3. Designing Processes
  4. Using and Displaying Data
  5. Designing Guides
  6. Designing Process Objects
  7. Designing Service Connectors
  8. Using App Connections
  9. System Services, Listeners and Connectors
  10. Designing Human Tasks

Design

Design

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tan

tan

The tan function in XQuery returns the tangent of a given numeric value interpreted as an angle in radians.

Syntax

math:tan(arg)
The following table describes the argument for this command:
Argument
Required/Optional
Description
arg
Optional
The input angle in radians.

Return Value

  • Returns the tangent value of the input angle in radians as an
    xs:double
    .
  • Returns
    true
     if the
    xml:lang
     attribute of the node or its nearest ancestor matches the
    $testlang
     value.
  • Returns
    false
     if there is no match or if
    xml:lang
     is absent.
  • Returns an empty sequence if the input is an empty sequence or invalid.

Examples

The following table lists some sample values and return values:
SAMPLE FUNCTION
OUTPUT
math:tan(0)
0
math:tan(1)
Approximately
1.55740772465490
math:tan(3.1415926535 div 4)
0.9999999999999999
math:tan(())
()

Additional information

  • The input angle is always in
    radians
    , not degrees.
  • To use degrees, you can convert degrees to radians as shown in the following expression:
    radians := degrees * (fn:pi() div 180)
  • The
    fn:tan
     function is useful in mathematical, geometric, and trigonometric calculations written in XQuery expressions.
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