Github user misutoth commented on a diff in the pull request:
https://github.com/apache/spark/pull/20618#discussion_r168525504
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -1313,131 +1313,178 @@ object functions {
//////////////////////////////////////////////////////////////////////////////////////////////
/**
- * Computes the cosine inverse of the given value; the returned angle is
in the range
- * 0.0 through pi.
+ * @param e the value whose arc cosine is to be returned
+ * @return cosine inverse of the given value in the range of 0.0
through pi,
--- End diff --
Ok.
Then I will cut the part about the domains and ranges.
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