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MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

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Udaljenost tocke od ravnineNeka je zadana ravnina koja prolazi tockomT 0 (x 0 ; y 0 ; z 0 ) i ima vektor normale ~n = A~i + B~j + C ~ k:Odredimo udaljenost tocke T 1 (x 1 ; y 1 ; z 1 ) od ravnine :Ta udaljenost (slika - predavanja) jednaka je duljini!projekcije vektora T 0 T 1 = ! r!1 r 0 na vektornormale ~n; tj.d (T 1 ; ) = j( ! r!1 r 0 ) ~nj = j(! r!1 r 0 ) ~njj~nj= j( ! r!1 r 0 ) ~n 0 j ()što raspisano preko komponenti dajed (T 1 ; ) = jA (x 1 x 0 ) + B (y 1 y 0 ) + C (z 1 z 0 )jpA2 + B 2 + C 2= jAx 1 + By 1 + Cz 1 + DjpA2 + B 2 + C 2 :Ako je pak ravnina zadana jednadbom u normalnomobliku ! r ! n 0 p = 0; onda jed (T 1 ; ) = j ! r 1! n 0pj= jx 1 cos + y 1 cos + z 1 cos pj :

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