[jira] [Assigned] (SPARK-23329) Update the function descriptions with the arguments and returned values of the trigonometric functions

["Apache Spark (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-23329?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-23329:
------------------------------------

    Assignee:     (was: Apache Spark)

> Update the function descriptions with the arguments and returned values of the trigonometric functions
> ------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-23329
>                 URL: https://issues.apache.org/jira/browse/SPARK-23329
>             Project: Spark
>          Issue Type: Documentation
>          Components: SQL
>    Affects Versions: 2.3.0
>            Reporter: Xiao Li
>            Priority: Minor
>              Labels: starter
>
> We need an update on the function descriptions for all the trigonometric functions. For example, {{cos}}, {{sin}}, and {{cot}}. Internally, the implementation is based on the java.lang.Math. We need a clear description about the units of the input arguments and the returned values. 
> For example, the following descriptions are lacking such info. 
> https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala#L551-L555
> https://github.com/apache/spark/blob/d5861aba9d80ca15ad3f22793b79822e470d6913/sql/core/src/main/scala/org/apache/spark/sql/functions.scala#L1978



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