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but
a 2 + b 2 + c 2 =1
c 2 =1
a 2
b 2
substituting c 2 in E 1 , 1
E 1 , 1 = a 2 + 1
cos α
a 2
b 2 + a 2 b 2
1
b 2
E 1 , 1 = a 2 + 1
a 2 1
b 2
cos α
1
b 2
E 1 , 1 = a 2 + 1
a 2 cos α
E 1 , 1 = a 2 (1
cos α )+cos α
Let
K =1
cos α
then
E 1 , 1 = a 2 K +cos α
To find E 1 , 2
E 1 , 2 =cos φ cos θ sin θ
cos φ sin θ cos θ cos α
sin φ cos θ sin α
1
1
a
a
1
b 2
1
b 2 cos α
E 1 , 2 =
·
·
b
·
b
·
b 2
b 2
1
c
1
·
b 2 sin α
b 2
E 1 , 2 = ab
ab cos α
c sin α
E 1 , 2 = ab (1
cos α )
c sin α
E 1 , 2 = abK
c sin α
To find E 1 , 3
E 1 , 3 =cos φ sin φ cos 2 θ +cos φ sin φ sin 2 θ cos α +sin 2 φ sin θ sin α
+cos 2 φ sin θ sin α
cos φ sin φ cos α
E 1 , 3 =cos φ sin φ cos 2 θ +cos φ sin φ sin 2 θ cos α +sin θ sin α sin 2 φ +cos 2 φ
cos φ sin φ cos α
E 1 , 3 =cos φ sin φ cos 2 θ +cos φ sin φ sin 2 θ cos α +sin θ sin α
cos φ sin φ cos α
· 1
b 2 +
a
c
a
c
b 2 cos α + b sin α
E 1 , 3 =
1
·
1
1
·
1
·
b 2
b 2
b 2
b 2
a
c
1
·
1
b 2 cos α
b 2
 
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