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    Hi can someone tell me how to approach this please.
    Exercise 6.
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    (Original post by Liampayneisapain)
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    Hi can someone tell me how to approach this please.
    Exercise 6.
    E.g. for angle ABC, find vectors \vec{AB} and \vec{BC} then use the dot product formula.
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    (Original post by notnek)
    E.g. for angle ABC, find vectors \vec{AB} and \vec{BC} then use the dot product formula.
    Got it thankyou!
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