www.mathsenligne.com STI2D - 1G1 - PRODUITSCALAIREDANSLEPLAN EXERCICES 3A
Rappels :
x 0 cos(-x) = cos x
cos( – x) = - cos x cos( + x) = - cos x
cos x 1 0 -1
EXERCICE 3A.1
Dans chaque cas, calculer le produit scalaire \s\up8(®.\s\up8(® :
= 4 = 3 (\s\up8(®,\s\up8(®) =
\s\up8(®.\s\up8(® =
= 5 = 2 (\s\up8(®,\s\up8(®) =
\s\up8(®.\s\up8(® =
= 7 = 3 (\s\up8(®,\s\up8(®) = -
\s\up8(®.\s\up8(® =
= 352 = 812 (\s\up8(®,\s\up8(®) =
\s\up8(®.\s\up8(® =
= = 2 (\s\up8(®,\s\up8(®) =
\s\up8(®.\s\up8(® =
= 4 = 3 (\s\up8(®,\s\up8(®) = -
\s\up8(®.\s\up8(® =
= 2 = (\s\up8(®,\s\up8(®) =
\s\up8(®.\s\up8(® =
= = 2 (\s\up8(®,\s\up8(®) =
\s\up8(®.\s\up8(® =
EXERCICE 3A.2
Dans chaque cas, calculer le produit scalaire :
\s\up8(®.\s\up8(® =
\s\up8(®.\s\up8(® =
\s\up8(®.\s\up8(® =
\s\up8(®.\s\up8(® =
\s\up8(®.\s\up8(® =
\s\up8(®.\s\up8(® =
\s\up8(®.\s\up8(® =
\s\up8(®.\s\up8(® =
0
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