Mathematics
Senior High
数Ⅲ部分積分について質問です。
マイナスがプラスになる理由を説明してほしいです🙏
x
x=\xtanxYdx
2
cos?
xtan x -\ tanxdx
sin x
dx
COS X
= xtan x
(cosx)
n
-dx
COS X
=xtanx+
= xtanx +log|cos x| +C
cp-
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