public void Cos()
{
var value = SqlExpression.Constant(Field.Number(new SqlNumber(9963)));
var result = Select("COS", value);
Assert.IsNotNull(result);
Assert.IsFalse(Field.IsNullField(result));
Assert.IsInstanceOf<NumericType>(result.Type);
Assert.IsInstanceOf<SqlNumber>(result.Value);
var number = ((SqlNumber) result.Value).ToDouble();
Assert.AreEqual(-0.53211858514845722, number);
}