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Math Help - Trig functions (very difficult)

  1. #1
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    Trig functions (very difficult)

    please find the question in the attachment
    its question no.4
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  2. #2
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    Hello kandyfloss
    Quote Originally Posted by kandyfloss View Post
    please find the question in the attachment
    its question no.4
    Have a look at the diagram I've attached. I've shown all the distances you need. You need to:

    • Calculate \angle BAC, using the Cosine Rule on \triangle ABC.
      .
    • Calculate \angle BAR using the fact that \triangle BAR is right-angled at R.
      .
    • Calculate \angle CAS in a similar way
      .
    • Hence calculate \angle PAT and finally the arc length PT

    Can you complete it now?

    Grandad
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  3. #3
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    Smile

    Oh wow,brilliant! I've been struggling to solve this.
    Very well explained and thanks a lot for the figure.
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