pls help | Revision Server | Page 1

lost charm Jun 20, 2023, 7:22 PM

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Pls help

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<@&791435371564892232>

tired stirrup Jun 20, 2023, 7:24 PM

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Use trigonometry to find the length of AC (using the right angle triangle ABC)

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Now you have AC and CD so you can use cosine rule to find AD

lost charm Jun 20, 2023, 7:27 PM

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Hi thanks for your help I’ve done that

sage violet Jun 20, 2023, 7:27 PM

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np

lost charm Jun 20, 2023, 7:28 PM

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This is my working out but it keeps saying it’s wrong I got 8.1cm please pardon my messing scribbles

tired stirrup Jun 20, 2023, 7:33 PM

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gimme a sec

lost charm Jun 20, 2023, 7:34 PM

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Oh ok thank you so much for your time

tired stirrup Jun 20, 2023, 7:34 PM

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Should be this

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6.5

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your working looks right

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maybe you put something into the calc wrong

lost charm Jun 20, 2023, 7:37 PM

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Thank you so much

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I realised my mistake

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I put sin(36) instead of cos that’s why

lost charm Jun 20, 2023, 7:38 PM

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Thank you again! @tired stirrup

#pls help