Mathematics
Senior High
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ly Jinradac Copa gia cho
ここで! cosx=tとおこと、
2
de te
-singliz ti
J",
sinxedo=_de
Spinex dx= $11-17.(-12)
[0²-1d² = {1²=t+C = frosted
dt
{ rostd-rossi + (
+
(2)
sin3xdx=
3sin x - sin 3x
4
dx = 1/ (3sin x-sin 3x) dx
1
=1/( -3cos x+cos3x) + C=-cosx+cos3x
4
12
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