add cotangent support on PySpark

Author: Yuto Akutsu

python/pyspark/sql/functions.py

@@ -377,6 +377,23 @@ def cosh(col):
     return _invoke_function_over_column("cosh", col)
 
 
+def cot(col):
+    """
+    .. versionadded:: 3.2.0
+
+    Parameters
+    ----------
+    col : :class:`~pyspark.sql.Column` or str
+        angle in radians
+
+    Returns
+    -------
+    :class:`~pyspark.sql.Column`
+        cotangent of the angle.
+    """
+    return _invoke_function_over_column("cot", col)
+
+
 @since(1.4)
 def exp(col):
     """

python/pyspark/sql/functions.pyi

@@ -298,6 +298,7 @@ def collect_set(col: ColumnOrName) -> Column: ...
 def column(col: str) -> Column: ...
 def cos(col: ColumnOrName) -> Column: ...
 def cosh(col: ColumnOrName) -> Column: ...
+def cot(col: ColumnOrName) -> Column: ...
 def count(col: ColumnOrName) -> Column: ...
 def cume_dist() -> Column: ...
 def degrees(col: ColumnOrName) -> Column: ...