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Triq question help

jamiew1990

Hi. I'm not very good at trigonometry and could really do with some help with this question. Would be appreciated. :smile:

I do know that Sin = O/H, Cos = A/H, Tan O/A.

Edit: Sorry, meant to put Trig not Triq...

(edited 9 years ago)

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Reply 1

brianeverit

Original post by jamiew1990

Hi. I'm not very good at trigonometry and could really do with some help with this question. Would be appreciated. :smile:

I do know that Sin = O/H, Cos = A/H, Tan O/A.

Edit: Sorry, meant to put Trig not Triq...

Elementary right angled trigonometry in triangle ABD should give you the lengths of ADF and BD.
From these you should be able to find the size of angle ABD
Subtraction from 90 degrees will give you angle DBC
Then you can find the length of DC and hence of AC.
You then have both base and height of triangle ABC so you can find the area.