Complex function

• ex = 1 +x + x2/2 + x3/6 + … + xn/n! +…

• e i? = 1 +i? +(i?)2/2 +(i ?)3/6 +(i ?)4/24 + …

• = 1 + i ? - ?2/2 -i ?3/6 +(?)4/24 + …

• = (1 - ?2/2 + ?4/24 - …) +i(? - ?3/6 +…)

• = cos ? + i sin ?

• e-i? = cos ? - i sin ?

e i? = cos ? + i sin ?

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