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y2
y3
y1
y8
x1
x2
x3
R1
R2
R3
R8
x8
y2
y3
y1
y8
x2
x3
x1
x8
=
tan(β)
=
=
.....
=
=
k
≡
y
x
y2
y3
y1
y8
R2
R3
R1
R8
=
sen(β)
=
=
.....
=
=
k
≡
y
R
x2
x3
x1
x8
R2
R3
R1
R8
=
cos(β)
=
=
.....
=
=
k
≡
x
R
β