Processing math: 100%
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TrigIdentity
Intermediate
Problem - 3156
Show that
C
0
n
−
C
2
n
+
C
4
n
−
C
6
n
+
⋯
=
2
n
2
cos
n
π
4
C
1
n
−
C
3
n
+
C
5
n
−
C
7
n
+
⋯
=
2
n
2
sin
n
π
4
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