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

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°

To find the height of the wall that will be in direct sunlight during the winter months, you'll need to use the same principles as in part a, but with different values.

First, let's determine the angle of the sun from the horizontal during the winter months. The lowest angle of the sun is given as 28 degrees, which means it forms a 90 - 28 = 62-degree angle with the vertical axis.

Now, since we want the wall to be exposed to as much sun as possible during winter, we are interested in the length of the shadow cast by the wall. To find this, we'll use trigonometry.

The length of the shadow (SH) can be determined using the tangent function:

tan(angle) = SH / wall height

Rearranging the formula, we get:

SH = wall height x tan(angle)

Now, substitute the values into the formula:

SH = 20 ft x tan(62 degrees)

Using a scientific calculator or online calculator, you can find that tan(62 degrees) is approximately 2.1445.

Thus,

SH ≈ 20 ft x 2.1445

SH ≈ 42.89 ft

Therefore, the height of the wall that will be in direct sunlight during the winter months is approximately 42.89 ft.

I hope this helps!