Mathematics
Senior High
Solved
下2行の解き方が分からないので解説して欲しいです。
y'=(cos5 x)'sin 5x + cos5 x (sin 5x)
= 5cos4x (-sin x). sin 5x
200)=\
+cos5 x (cos5x).5205)=
=5cos4 x(cos x cos 5x - sin xsin 5x)
ixsin 3
=5cos4xcos 6x +
\805(1+xS)
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