what is wrong with exp(1 - 1j).real : <p><a href="https://i.stack.imgur.com/Ngum8.png" rel="nofollow noreferrer">enter image description here</a></p>

<p>I do not how to tackle with the exponent function with complex in power<a href="https://i.stack.imgur.com/Ngum8.png" rel="nofollow noreferrer">enter image description here</a></p>
