# Details of logarithmic calculations?

From where I can get the details of lograthmic calculations?How the values are found?and on what basis?

Do you want to know for instance how $$\log{3}$$ is found? That kind of calculation?

Jameson said:
Do you want to know for instance how $$\log{3}$$ is found? That kind of calculation?
Actually I want to know this:We know that log{2} is 0.3010.How it is calculated?

kiru said:
Actually I want to know this:We know that log{2} is 0.3010.How it is calculated?

I would have the same question + how cosines are calculated.

HallsofIvy