The diagram shows the triangle PQR. Given that PQ = 3i j + 2k and QR

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The diagram shows the triangle PQR. Given that PQ = 3i − j + 2k and QR = −2i + 4j + 3k, show that ∠PQR = 78.5° to 1 d.p.

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Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

ISBN: 9781292183404

1st Edition

Authors: Greg Attwood, Jack Barraclough, Ian Bettison, David Goldberg, Alistair Macpherson, Joe Petran

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The diagram shows the triangle PQR. Given that PQ = 3i j + 2k and QR

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P Q R

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PO 14 QR 29 PR 3...View the full answer

Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

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