H2 Maths Notes (JC 1-2): 3.2) Scalar and Vector Products

Q: What does H2 Maths Notes (JC 1-2): 3.2) Scalar and Vector Products cover?
A: Dot products, cross products, projections, and their geometric applications for H2 Maths Topic 3.2.

Before you revise
Keep a checklist of formulas: dot product, projection, cross product determinant, and triple scalar product. Write them out at the top of every practice set until they become automatic.

Scalar (Dot) Product

• Definition: $\vec{a} \cdot \vec{b} = a_1 b_1 + a_2 b_2 + a_3 b_3 = \lVert \vec{a} \rVert \lVert \vec{b} \rVert \cos\theta$