sql/hive/src/test/resources/golden/udf_acos-2-d330511cf4f626cd844b18f57f99a85f


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acos(x) - returns the arc cosine of x if -1<=x<=1 or NULL otherwise
Example:
  > SELECT acos(1) FROM src LIMIT 1;
  0
  > SELECT acos(2) FROM src LIMIT 1;
  NULL