Mathematics
Undergraduate
ここの変形を教えて下さい
da
= a(1- cost),
dy
=a sint から,
dt
dt
V(金)+()
2
2
- 2a|sin= 2asin, (::a>0, 0StS2m)
= 2a sin
2
dt
dt
2元
2元
t
2a sin- dt =
2
l=
2a.2|- cos
COS
= 8a
ニ
2
0
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