B. A= A12+A12 +A A COS (1 2 Φ −Φ1 2) A. Φ + Φ= + +2 2 1 2A A A 2A...
2
)
B.
A
=
A
1
2
+
A
1
2
+
A A cos (
1
2
ϕ −ϕ
1
2
)
A.
ϕ + ϕ
=
+
+
2
2
1
2
A
A
A
2A A cos (
1
1
1
2
2
)
B.
A
=
A
1
2
+
A
1
2
+
A A cos (
1
2
ϕ −ϕ
1
2
)
A.
ϕ + ϕ
=
+
+
2
2
1
2
A
A
A
2A A cos (
1
1
1
2