| Exam Board | OCR |
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| Module | C4 (Core Mathematics 4) |
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| Year | 2014 |
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| Session | June |
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| Topic | Vectors 3D & Lines |
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2 The points \(O ( 0,0,0 ) , A ( 2,8,2 ) , B ( 5,5,8 )\) and \(C ( 3 , - 3,6 )\) form a parallelogram \(O A B C\). Use a scalar product to find the acute angle between the diagonals of this parallelogram.