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authorOpheliar99 <>2010-07-04 04:28:53 +0000
committerbnewbold <bnewbold@adelie.robocracy.org>2010-07-04 04:28:53 +0000
commit0774a65c9cdbd4992b972eefff31b2da83c2c40b (patch)
tree12c18ae1f8b0b77b8237bf08c2447940052f5d3b /Problem Set 2.page
parent60d31ba77b860e5f788fb97fb87d44043288a27e (diff)
downloadafterklein-wiki-0774a65c9cdbd4992b972eefff31b2da83c2c40b.tar.gz
afterklein-wiki-0774a65c9cdbd4992b972eefff31b2da83c2c40b.zip
posted solutions of 2 and 3 in pset2
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@@ -40,7 +40,6 @@ $\int_0^{2\pi} |\sin^2(x)|^2 dx = \sum |a_n|^2.$
2. Since
$\sin x = \frac{e^{ix}-e^{-ix}}{2}$,
-
$\sin^4 x = \frac{{( e^{ix}-e^{-ix} )}^4}{16}$
$= \frac{e^{i 4x}+e^{-i 4x}-4 e^{i 2x} -4 e^{-i 2x}+6}{16}$.