please find the question in the attachment

its question no.4

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- Apr 26th 2010, 07:13 AMkandyflossTrig functions (very difficult)
please find the question in the attachment

its question no.4 - Apr 27th 2010, 01:04 AMGrandad
Hello kandyflossHave a look at the diagram I've attached. I've shown all the distances you need. You need to:

- Calculate $\displaystyle \angle$ BAC, using the Cosine Rule on $\displaystyle \triangle$ ABC.

. - Calculate $\displaystyle \angle$ BAR using the fact that $\displaystyle \triangle$ BAR is right-angled at R.

. - Calculate $\displaystyle \angle$ CAS in a similar way

. - Hence calculate $\displaystyle \angle$ PAT and finally the arc length PT

Can you complete it now?

Grandad - Calculate $\displaystyle \angle$ BAC, using the Cosine Rule on $\displaystyle \triangle$ ABC.
- Apr 27th 2010, 09:36 AMkandyfloss
Oh wow,brilliant! I've been struggling to solve this.

Very well explained and thanks a lot for the figure. (Nod)