Page 3: Trigonometry and Equations
The final page covers trigonometry and equation solving, advanced topics in the Programme officiel maths 3ème PDF.
Basic trigonometric ratios sine,cosine,tangent are introduced in the context of right-angled triangles.
Example: In a right-angled triangle with an angle of 70°, cos70° = adjacent/hypotenuse.
Inverse trigonometric functions arcsin,arccos,arctan are also mentioned, showing how to find angles given trigonometric ratios.
Vocabulary: Fonctions trigonométriques réciproques inversetrigonometricfunctions, arcsin, arccos, arctan.
The page concludes with a section on solving equations, emphasizing the importance of isolating the variable.
Highlight: When solving equations, remember to perform the same operations on both sides to maintain equality.
Example: Solving 3x + 5 = -4 = 3x + 2 + 3x involves combining like terms and isolating x.
These concepts are crucial for exercices Thalès et Pythagore corrigé 3ème and provide a foundation for more advanced mathematical studies.