Οͺ(3)Μ1D(6)Μπ
∫
sin3xcos5xdx
=
∫
1
2
{
sin(
3x+5x
)
+sin(
3x−5x
)}dx
=
1
2
∫
{
sin8x+sin(
−2x
)
}dx
=
1
2
∫
(
sin8x−sin2x
)dx
=
1
2
{
1
8
(
−cos8x
)
−
1
2
(
cos2x
)
}+C
=−
1
16
cos8x+
1
4
cos2x+C
Λ qg1
Λ πΰ1
Λ Οͺ(3)ΜTOPΦίι
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