How
do dimensions behave in mathematical
formulae?

**Rule 3 - **In
scientific equations, the arguments of

“transcendental functions” must be dimensionless.**
**

*x* must be dimensionless*
*

**Exception
- **In engineering correlations, the
argument may have
dimensions**
**

**Transcendental Function - **Cannot
be given by algebraic expressions consisting only of the
argument and constants.** **Requires an infinite series**
**