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Short answer·Standard multi-step (3/5)·No calculatorNeeds mentor review

Difficulty guide

The label describes the problem, not your ability.

1/5 - Foundational

Warm-up setup; checks one basic idea.

2/5 - Routine exam skill

Normal syllabus skill; usually one main rule or interpretation.

3/5 - Standard multi-step

Exam-style problem with multiple steps or a common trap.

4/5 - Hard exam skill

High-end exam problem; combines methods carefully.

5/5 - Challenge

Stretch problem beyond normal exam pressure.

Question

Find the angle θ\theta between (1,2,2)(1,2,2) and (2,1,2).(2,1,2).
Total: 3 marks

(a) Find cos⁡θ\cos\theta and hence the angle expression. (3 marks)

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cbse-math-12.u4.t4-3.saq.003

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