# Trigonometry question, please help!

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• April 25th 2008, 06:58 PM
zxe
Trigonometry question, please help!
hey people, here's the question that i have absolute no idea to answer...

Quote:

A triangle $ABC$ is right-angled at $B$
$D$ is the point on $AC$ such that $BD$ is perpendicular to $AC$
Let Angle $BAC$ = $x$
You are given that $6AD + BC = 5AC$

Find $x$
I had drawn the diagram on my book but i have no idea what to do to find $x$
Please help, would be much appreciated.
• April 25th 2008, 08:14 PM
mr fantastic
Quote:

Originally Posted by zxe
hey people, here's the question that i have absolute no idea to answer...

I had drawn the diagram on my book but i have no idea what to do to find $x$
Please help, would be much appreciated.

Triangles ABD, BCD and ACB are all similar ....