Question about Parsons QuickVerse 7 Essentials (fe11044) for PC

# TRIANGLES FROM A WINDOW 30 feet above the ground,a building 100 feet high, and at a distance of 200 feet, is observed.find the angle of elevation of the top of the building and the angle of depression of its base.

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Tan x=70/200 => angle of elevation,x is ....

tan y=30/200 => angle of depression, y, is...

Posted on Sep 04, 2008

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• FROM A WINDOW 30 feet above the ground,a building 100 feet high, and at a distance of 200 feet, is observed.find the angle of elevation of the top of the building and the angle of depression of its base.

Posted on Aug 01, 2008

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Posted on Jul 14, 2008

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Posted on Jan 02, 2017

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### From a point on the ground, a person notices a 110-foot antenna on the top of a hill subtends an angle of 1.5 deg. If the angle of elevation on the bottom of the antenna is 25 deg, find the height of the...

Draw one right-angle triangle:

D
C
/'
/ '
/ '
/ '
A===B

A = your location
B = bottom of the hill
C = bottom of the antenna
D = top of the antenna

The A-B distance is constant.
The B-C distance is unknown.
The B-C-D distance is unknown.
The C-D distance is given.
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Tell your teacher that you found the answer to your homework on the Internet.

Sep 24, 2010 | Computers & Internet

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### An trigonometry wordproblem

Hi there,

Using the measurements you have given and calculating the others as follows:

Angle A= 30 degrees
Side b= 900 metres
Angle B= 60 degrees
Side b= 1558.845 metres

Therefore length of the slope = 1,800.0000000000002 metres (side c)

Hope this helps. Regards, James

Apr 22, 2010 | Televison & Video

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### Antenna mounting

according to FCC rules RULE 8 - Antenna Height
{A} "Antenna" means the radiating system (for transmitting, receiving or both) and the structure holding it up (tower, pole or mast). It also means everything else attached to the radiating system and the structure.
{B} If your antenna is mounted on a hand-held portable unit, none of the following limitations apply;
{C} If your antenna is installed at a fixed location (whether receiving, transmitting or both) it must comply with EITHER one of the following:
[1] The highest point must not be more than 20 feet (6.10 meters) higher than the highest point of the building or tree on which it is mounted;
or
[2] The highest point must not be more than 60 feet (18.3 meters) above the ground.
{D} If your CB station is located near an airport, and if your antenna structure is more than 20 feet (6.10 meters) high, you may have to obey additional restrictions. The highest point of your antenna must not exceed 39.37 inches (1 meter) above the airport elevation for every 109.36 yards (100 meters, 1 hectometer) of distance from the nearest point of the nearest airport runway. Differences in ground elevation between your antenna and the airport runway may complicate this formula. If your CB station is near an airport, you may contact the nearest FCC field office for a worksheet to help you figure the maximum allowable height for your antenna.

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