| Trigonométrie |
sommaire |
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| sinus
= coté opposé / hypoténuse |
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| cosinus
= coté adjacent / hypoténuse |
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| tangente
= coté opposé / coté adjacent |
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sin A= |
a/c |
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cos A= |
b/c |
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tan A= |
a/b |
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Pythagore: |
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c²=a²+b² |
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Résolution rapide de Triangles
rectangles |
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| Exemple donné avec le triangle 3 - 4 - 5. Les cases de gauche
sont les variables |
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valeurs connues |
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Solutions |
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c |
b |
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a |
C |
B |
A |
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5.00 |
4.00 |
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3.00 |
90.00 |
53.13 |
36.87 |
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c |
a |
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b |
C |
B |
A |
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5.00 |
3.00 |
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4.00 |
90.00 |
53.13 |
36.87 |
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c |
A |
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a |
C |
b |
B |
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5.00 |
36.87 |
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3.00 |
90.00 |
4.00 |
53.13 |
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a |
B |
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a |
C |
b |
A |
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5.00 |
53.13 |
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3.00 |
90.00 |
4.00 |
36.87 |
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a |
b |
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c |
C |
A |
B |
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3.00 |
4.00 |
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5.00 |
90.00 |
36.87 |
53.13 |
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b |
B |
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c |
C |
a |
A |
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4.00 |
53.13 |
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5.00 |
90.00 |
3.00 |
36.87 |
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b |
A |
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c |
C |
a |
B |
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4.00 |
36.87 |
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5.00 |
90.00 |
3.00 |
53.13 |
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a |
A |
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c |
C |
b |
B |
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3.00 |
36.87 |
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5.00 |
90.00 |
4.00 |
53.13 |
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a |
B |
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c |
C |
b |
A |
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3.00 |
53.13 |
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5.00 |
90.00 |
4.00 |
36.87 |
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