Question 1075983
<pre>
Just substitute a=0 and b=<font face="symbol">p</font>, 
like I told you before.  Also notice that in your post
you needed to put ^ to indicate exponents, not just
write them next to the base, for that shows multiplication
only, not exponentiation.  Also you must enclose the
exponents in parentheses.

{{{e^(a + bi) = e^a*(cos(b)^"" + isin(b))}}}

{{{e^(0 + (pi)i) = e^0(cos(pi)^"" + isin(pi))}}}

Now we use the facts that {{{e^0=1}}}, {{{cos(pi)=-1}}}, and {{{sin(pi)=0}}}:

{{{e^(pi*i) = 1((-1)^"" + i(0))}}}

{{{e^(pi*i) = -1}}}

Add 1 to both sides:

{{{e^(pi*i)+1=0}}}

Edwin</pre>