CSCA MathematicsChapter 3: Geometry & AlgebraBeginner
Plane Vectors: Linear Operations & Dot Product
平面向量的线性运算与数量积 · Node 3.2
Vector coordinates, collinearity condition $x_1 y_2 - x_2 y_1 = 0$, dot product $\mathbf{a}\cdot\mathbf{b}$, angle formula, and orthogonality.
Chapter Weight: 25% of official examination
Practice This NodeCore Mathematical Axiom
Formula Proof & TrapsCSCA Exam Trap Alert
Confusing parallel vector condition $(x_1 y_2 - x_2 y_1 = 0)$ with perpendicular condition $(x_1 x_2 + y_1 y_2 = 0)$.