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Note de cours sur la trigonométrie

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Notes de cours sur la trigonométrie

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^ ^

îîIL
Matftéincitique 4 SW
Cfiayitre 6
Trigononietrie
t




«


7




<


%
60,6'

L^-d-'
IM.'.flm mm




!Nbm :

(groupe :

Jean-Marie SaCiÈa
àjjartir cCun cCocument cCJAnnie (gagnon
2023-2024

, Trigonométrie : branche des mathématiques étudiant les relations entre les mesures des
côtés et celles des angles d'un triangle.

l. Rapports triaonométriaues dans le triangle rectangle

1.1 Le triangle rectangle
B


Hypoténuse Cathète opposée
e
l'angle A
a

Cathète adjacente
Dans un triangle
l'angle B
rectangle, les
angles aigus sont A
b e
complémentaires.
Cathète adjacente à
l'angle A

Cathète opposée à
l'angle B


1.2 Rapports triaonométriaues

*Uniauement dans les triangles rectangles.


Rapport trigonométrique Notation
abrégée

mesure de la cathète opposée à l'angleA sinA = -
sinus A
mesure de l'hypoténuse e




cosinus A =
mesure de la cathète adjacente a l angle A
cos A =-
mesure de l'hypoténuse e



mesure de la cathète opposée à l'angleA a
tanA =-
tangente A b
mesure de la cathète adjacente à l'angleA

2
Jean-Marie Saliba
2021-2022

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12th Grade
School year
1
Uploaded on
April 1, 2026
Number of pages
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Written in
2025/2026
Type
Class notes
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