It is how many times we need to use 10 in a multiplication to get our desired number. Relationship between exponentials logarithms. Tables of trigonometric functions were used in ancient Greece and India for applications to astronomy and celestial navigation.
Each log table is only usable with a certain base.
First lets find some log values and see what they mean when re-expressed in index notation. A Complete Table Of Common Logarithm And Antilogarithm For Mathematics Students. Find the log of a number. They continued to be widely used until electronic calculators became cheap and plentiful in order to simplify and drastically speed up computation.