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tia_tia [17]
3 years ago
5

The area covered by a spotlight on the side of a house is 954 square feet, as seen in the diagram below.

Mathematics
1 answer:
miss Akunina [59]3 years ago
4 0

Answer:

27.25\ ft^2

Step-by-step explanation:

<u><em>The picture of the question in the attached figure</em></u>

we know that

The  area on the side of the house that is NOT covered by the light is equal to the area of semicircle minus the area covered by a spotlight on the side of a house

Find the area of the semicircle

The area of a semicircle is equal to

A=\frac{1}{2}\pi r^{2}

we have

r=25\ ft\\\pi=3.14

substitute

A=\frac{1}{2}(3.14)(25)^{2}

A=981.25\ ft^2

Find the difference

A=981.25-954=27.25\ ft^2

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Step-by-step explanation:

There are a couple of ways to go at these. One is to use the sum and difference formulas for the cosine and sine functions. To do that, you need to find the sine for the angle whose cosine is given, and vice versa.

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__

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