# Is the following statement valid according to Euler's formula? Cos(2npi) = (-1)^2n

QUESTION POSTED AT 29/05/2020 - 12:55 AM

QUESTION POSTED AT 29/05/2020 - 12:55 AM

Provided that is an integer, the statement is true.

Meanwhile, Euler's formula gives us

and we know that for all integers , while .

Meanwhile, Euler's formula gives us

and we know that for all integers , while .

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