cot

Returns the cotangent of the angle specified in radians.

cot(angle)

angle: is any approximate numeric (float, real, or double precision) column name, variable, or constant expression.

select cot(90)

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           -0.501203

cot, a mathematical function, returns the cotangent of the specified angle, in radians.

ANSI SQL – Compliance level: Transact-SQL extension.

Any user can execute cot.