<Dd> e x = cosh ⁡ x + sinh ⁡ x (\ displaystyle e ^ (x) = \ cosh x+ \ sinh x) </Dd> <Dl> <Dd> e − x = cosh ⁡ x − sinh ⁡ x (\ displaystyle e ^ (- x) = \ cosh x - \ sinh x) </Dd> </Dl> <Dd> e − x = cosh ⁡ x − sinh ⁡ x (\ displaystyle e ^ (- x) = \ cosh x - \ sinh x) </Dd> <P> These expressions are analogous to the expressions for sine and cosine, based on Euler's formula, as sums of complex exponentials . </P>

Whats the difference between even and odd functions