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

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07 Oct 2025, 00:00 Z

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Marcus Pang·Managing Director (Maths)

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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, and the cross-product determinant. Drill their geometric meanings (angles, scalar components, areas, plane normals) so you can explain answers in words.

Status: SEAB H2 Mathematics (9758, first exam 2026) syllabus last checked 2026-01-13 (PDF last modified 2024-10-16). Topic 3.2 covers dot/cross products and projections; triple products are explicitly excluded.

Scalar (Dot) Product

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