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(0 )2 1436587@9BAC9EDGF4HI 7P5QHRFTSVU0DXW6F4H

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6 CAPÍTULO 1. ¢¡¤£¦¥¨§©¢£ ¥£§§¥ £<br />

2 T A = X X −<br />

¢¡<br />

I3<br />

<br />

<br />

A3 = AA2 <br />

0 −c b<br />

<br />

a2 − 1 ab ac<br />

= c 0 −a ab b<br />

−b a 0<br />

2 − 1 bc<br />

ac bc c2 <br />

− 1<br />

<br />

−abc + abc −c(b2 − 1) + b2c −bc2 + b(c2 − 1)<br />

=<br />

=<br />

c(a 2 − 1) − a 2 c abc − abc ac 2 − a(c 2 − 1)<br />

−b(a2 − 1) + a2b −ab2 + a(b2 − 1) −abc + abc<br />

<br />

0 c −b<br />

<br />

0 −c b<br />

<br />

= −A<br />

¡ ¨ A =<br />

<br />

<br />

<br />

c 0 a<br />

b −a 0<br />

AB = BA =<br />

= −<br />

cos θ sin θ<br />

A n =<br />

¨ ¨¥<br />

AB<br />

<br />

cos θ<br />

=<br />

− sin θ<br />

sin θ<br />

cos θ<br />

<br />

=<br />

=<br />

−c 0 −a<br />

−b a 0<br />

B =<br />

cos α sin α<br />

− sin θ cos θ<br />

− sin α cos α<br />

<br />

cos (θ + α) sin (θ + α)<br />

<br />

− sin (θ + α) cos (θ + α)<br />

cos (nθ) sin (nθ)<br />

− sin (nθ) cos (nθ)<br />

cos α sin α<br />

− sin α cos α<br />

<br />

, n ∈ IN<br />

cos θ cos α − sin α sin θ cos θ sin α + sin θ cos α<br />

− sin θ cos α − cos θ sin α cos θ cos α − sin θ sin α<br />

<br />

<br />

cos (θ + α) sin (θ + α)<br />

− sin (θ + α) cos (θ + α)<br />

<br />

<br />

BA =<br />

=<br />

cos (α + θ) sin (α + θ)<br />

<br />

− sin (α + θ) cos (α + θ)<br />

cos (θ + α) sin (θ + α)<br />

− sin (θ + α) cos (θ + α)<br />

<br />

<br />

<br />

= AB

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