Hight trig word problem - How high above the street is the light? - Am very stuck

I am stuck on a trig word problem. The problem shows a diagram of a street light. The length of the base pole is 28.0ft, the length of the pole connected from base pole to street light is 12.5ft. The angle of the connected poles is 20.0 degrees. How high above the street is the light?

Thank you

1 Attachment(s)

Re: Hight trig word problem - How high above the street is the light? - Am very stuck

Do you mean like this?

Attachment 24165

If so, use the definition of cosine applied to the triangle ABC.

Re: Hight trig word problem - How high above the street is the light? - Am very stuck

Yes That is what I mean. Thank you