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Data Analysis Expressions (DAX) is the native formula and query language for Microsoft PowerPivot, Power BI Desktop and SQL Server Analysis Services (SSAS) Tabular models. DAX includes some of the functions that are used in Excel formulas with additional functions that are designed to work with relational data and perform dynamic aggregation.
The tangent half-angle substitution relates an angle to the slope of a line. Introducing a new variable = , sines and cosines can be expressed as rational functions of , and can be expressed as the product of and a rational function of , as follows: = +, = +, = +.
A propositional formula is a tautology if it is true under every valuation (or interpretation) of its predicate symbols. If Φ is a tautology, and Θ is a substitution instance of Φ, then Θ is again a tautology. This fact implies the soundness of the deduction rule described in the previous section.
Vic Fangio's coaching career started in the 1970s as a high school assistant in Pennsylvania and has taken him across the country in various stops as he grew into one of the most innovative ...
The Central Intelligence Agency on Tuesday became the first major national security agency to offer so-called buyouts to its entire workforce, a CIA spokesperson and two other sources familiar ...
Waterfront properties are at a premium, so it might be time to consider a desert town. Whether you're looking for a vacation property, want to move full-time or are simply interested in an ...
This formula expresses the fact that the absolute value of the determinant of a matrix equals the volume of the parallelotope spanned by its columns or rows. More precisely, the change of variables formula is stated in the next theorem:
Two new studies suggest once again the importance of getting a good night's sleep for good health over a lifetime, as scientists pursue new understandings of restorative deep sleep.