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Mathematics
Mathematics
Problem
In the figure lengths of
A
B
AB
A
B
and
A
C
AC
A
C
are both equal to
1
1
1
, the length of
B
D
BD
B
D
is denoted as
x
x
x
and the length of
C
E
CE
C
E
is denoted as
y
y
y
.
B
E
BE
B
E
is perpendicular to
A
C
AC
A
C
and
E
D
ED
E
D
is perpendicular to
A
B
AB
A
B
. The value of
lim
θ
→
0
x
y
\lim_{\theta \rightarrow 0} \frac{x}{y}
lim
θ
→
0
y
x
, is
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