OCR C4 2008 January — Question 1

Exam BoardOCR
ModuleC4 (Core Mathematics 4)
Year2008
SessionJanuary
TopicVectors 3D & Lines
1 Find the angle between the vectors \(\mathbf { i } - 2 \mathbf { j } + 3 \mathbf { k }\) and \(2 \mathbf { i } + \mathbf { j } + \mathbf { k }\).
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