<PRE><B>Question 682713</B>
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You can&#39;t prove either one of those.  x and X are two different things.  In the first one you have a sine function with no argument.  In the second one you have a cosine function with no argument.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
&lt;font face=&quot;Math1&quot; size=&quot;+2&quot;&gt;Egw to Beta kai to Sigma&lt;/font&gt;
My calculator said it, I believe it, that settles it
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