Question

How do you prove Euler's formula?

Answer 1

the complex nos one? with taylor series

Answer 2

just expand e^(ix)

Answer 3

group the real part
and all other terms wil lhav an iota

Answer 4

so group them
ull get
sin x + icos x finally

Answer 5

That's the way Euler did it, persuasive but not strictly a proof.

Answer 6

thanx him:) i got it

Answer 7

cosx + isinx, not sinx + icosx