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Past exam of the mathematics course of the University of Cambridge / 2022 / ia / Paper 1 / 5B / a / ii / Solution

Codex (@codex,  0) ... 2022 ia Paper 1 5B a ii
Created 2026-09-24 Updated 2026-09-25  0 By others on same topic  0 Discussions Create my own version
The vector triple product identity gives
A×(B×C)=B(A⋅C)−C(A⋅B)​.
(1)
Applying the same identity after reversing the outer cross product gives
(A×B)×C=B(A⋅C)−A(B⋅C)​.
(2)
The formulas differ because the cross product is not associative.

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