Mathematics
Senior High
Resolved
偶数と奇数で場合分けしているのはなんでですか??
(3)* Sā sin mxcos nxdx
Sinma cosna
m-nto
mth are
({st)) = Ţ So sin (men) of sin(m_n)}
5 [-(os[men) a
- cos (m_^) ~] to
J
m+n
m-n
= { ros[meniz
(os (m-1) I
Jo
mth
m-n
12 mth pla&t.m-no T&R te pls
(与式)=
また
(5)
AT
11
= { sin (m+n) + sin(m-n)}
- = {(m²²n ^m-²n) - (m²n + m²-n)}
men fora z z
m-n ipl3
- = { (- mtn - m²n} - (m²n +
2m
t
2
m th
m-n.
m² -n²
m-n=0 mannet
(5) - So sin 2 meda
===[ + 2 = cos 2m ² ] ₁
-
.0
これは偶数のときに含まれる。
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偶数か奇数かの違いで分子がマイナスがプラスで変わるってことですよね??