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Spot the odd one out

Exercise and reference answers

Questions
  1. Items
    1. Zero vector
    2. Unit vector
    3. Determinant
    4. Negative of a vector
    Odd item
    Determinant
  2. Items
    1. Triangle law
    2. Section formula
    3. Parallelogram law
    Odd item
    Section formula
  3. Items
    1. cos θ
    2. scalar product
    3. sin θ
    Odd item
    sin θ

Explanation

Each group is one summary bullet. Source: syllabus Maths Part II, Ch 10 Vector Algebra.
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