Changes

[[Euler]]'s formula is the following identity in complex analysis making use of the [[imaginary number]] <math>i</math>:

'''[[Euler]]'s formula''' is the following identity in complex analysis making use of the [[imaginary number]] <math>i</math>:

:<math>e^{i\phi} = \cos \phi + i\sin \phi \!</math>

:<math>e^{i\phi} = \cos \phi + i\sin \phi \!</math>