Trigonometry

Hi this is a two part question. I got the first part but can't figure out second. Please help!

A home is designed to keep sun off outside south wall during summer months and have wall exposed to dun as much as possible during winter months. The highest angle of sun in summer is 73 degrees.

a) the wall of house is 20 ft tall. How much overhang on roof trusses shoukd be provided so sun reaches bottom of wall during summer.
I got approx. 6.11 ft. for an answer.
Part b is where I need help!
b) the lowest angle of sun during winter months is 28 degrees. What height of wall will be in direct sunlight during winter months?

B) the lowest

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asked by Cherie
  1. Draw another line making an angle of 28°, passing through the tip of the overhang to the wall. If the height of sunlight on the wall is x, then

    (20-x)/6.11 = tan 28°

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    posted by Steve

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