I am writing an article and trying to find the proper words/terms for different representations of numbers. The article is regarding calculating the SIN, COS and TAN of a number of angles without getting decimal numbers because the "other" form is better for calculations when these are used in other formulas.
Here are two examples:
Two square roots of two can be written in the following two ways:
First: $$ 2\sqrt 2 $$
Second (floating point/decimal): $$ 2.82842712475 $$
The second example is a decimal number.
What is the name for the representation of two square root of two in the first example?