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sin
B
0
b
+O
C
(
b
2
)
,
cos
B
=cos(
B
0
+
b
)=cos
B
0
−
E
2
sin
2
B
2
)
−
2
=1+2
E
2
sin
2
B
+O(
E
4
)=
=
1+2
E
2
sin
B
0
+4
E
2
sin
B
0
cos
B
0
+O(
E
4
)
b
+O(
b
2
)
,
(1
−
(20.168)
E
2
sin
2
B
)
−
2
=
cos
B
(1
−
sin
B
0
b
+2
E
2
sin
2
B
0
cos
B
0
2
E
2
sin
3
B
0
b
+4
E
2
sin
B
0
cos
2
B
0
b
+O(
b
2
)
,
B
S
=
B
0
+
b
S
,B
N
=
B
0
+
b
N
,
=cos
B
0
−
−
+
l
E
b
N
=
A
1
(1
E
2
)
d
b
(cos
B
0
+2
E
2
sin
2
B
0
cos
B
0
)+
S
E
2
A
1
,A
2
−
d
l
(20.169)
−l
E
b
S
+
l
E
b
N
+
A
1
(1
E
2
)
2
E
2
sin
3
B
0
+4
E
2
sin
B
0
cos
2
B
0
+
o
(
E
4
)]
b
+O(
b
2
)
,
−
d
l
d
b
[
−
sin
B
0
−
−l
E
b
S
E
2
)
l
E
2(cos
B
0
+2
E
2
sin
2
B
0
cos
B
0
)(
b
N
−
=
A
1
(1
S
E
2
A
1
,A
2
−
b
S
)+
(20.170)
+[
−
sin
B
0
−
2
E
2
sin
3
B
0
+4
E
2
sin
B
0
cos
2
B
0
+O(
E
4
)](
b
N
− b
S
)+O(
b
N
− b
S
)
,
+
l
E
b
N
d
b
cos
B
0
+2
E
2
sin
2
B
0
cos
B
0
+
I
AR
=
A
1
(1
E
2
)
2
S
E
2
A
1
,A
2
−
d
l
−l
E
b
S
2
E
2
sin
3
B
0
+4
E
2
sin
B
0
cos
2
B
0
cos
2
B
0
+O(
E
4
)]
b
+O(
b
2
)
×
+[
−
sin
B
0
−
(20.171)
cos
4
B
0
36
(1
− E
2
sin
2
B
0
)
2
b
4
+O
R
(
l
5
,b
5
)
,
E
2
sin
2
B
0
)
2
(1
l
4
+
cos
2
B
0
18
E
2
)
2
(1
−
l
2
b
2
+
1
36
(1
−
×
−
E
2
)
2
+
l
E
b
N
I
AR
=
A
1
(1
E
2
)
2
S
E
A
1
,A
2
−
d
b
[
Al
4
+
Bl
2
b
2
+
Cb
4
+
Dl
4
b
+
Pl
2
b
3
d
l
−l
E
b
S
+
Qb
5
+O
R
(6)]
,
(20.172)
(1
−
E
2
sin
2
B
0
)
2
(1
A
:= [cos
B
0
+2
E
2
sin
2
B
0
cos
B
0
+O(
E
4
)]
cos
4
B
0
36
,
−
E
2
)
2
B
:= [cos
B
0
+2
E
2
sin
2
B
0
cos
B
0
+O(
E
4
)]
cos
2
B
0
,
18
E
2
)
2
C
:= [cos
B
0
+2
E
2
sin
2
B
0
cos
B
0
+O(
E
4
)]
1
36
(1
−
E
2
sin
2
B
0
)
2
,
(1
−
(20.173)
sin
B
0
cos
4
B
0
36
D
:=
−
[3 + 2
E
2
(3
cos
2
B
0
)] + O(
E
4
)
,
−
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