A A
F
S
W F S
F S cos
B C
Ă—
B (1) (2) (3) (4)
(5) (6) C (1) F
S
(
0 ) (S)
(F) F F
W F S S
(
F
W F S S
( (F)
F
F S
180 ) (S)
(F) F
F S cos 0
W F S
F S cos180
F S
90 ) (S) F S cos 90
0
A A
F
S
W F S
F S cos
B C
Ă—
B (1) (2) (3) (4)
(5) (6) C (1) F
S
(
0 ) (S)
(F) F F
W F S S
(
F
W F S S
( (F)
F
F S
180 ) (S)
(F) F
F S cos 0
W F S
F S cos180
F S
90 ) (S) F S cos 90
0