Question about Acer Aspire One AOA150-1126 Notebook

# A television antenna casts a shadow that is 75.0 m long. If the angle of elevation of the sun is 39 degrees, calculate how high above the ground a bird perched on the top of the antenna

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Posted on Feb 08, 2012

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Posted on Jan 02, 2017

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## Related Questions:

### A tree on a hillside casts a shadow 215 ft. down the hill.if the angle of inclination of the hillside is 22 degrees to the horizontal and the angle of elevation of the sun is 52 degrees ,find the height of...

x is the height of tree, y and z are as denoted in picture:

1. cos(22°)=y/215==>y=cos(22°)*215=199.3 ft
2. sin(22°)=z/215==>z=sin(22°)*215=80.5 ft
3. tan(52°)=(x+z)/y==>x+z=y*tan(52°)=255.1 ft
4. x=255.1-z=255.1-80.5=174.6 ft

Sep 06, 2011 | Casio fx-300ES Calculator

### 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

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.
The C-A-B angle is given as 25 degrees.
The D-A-C angle is given as 1.5 degrees.

Use SINE and COSINE functions to determine the B-C distance.

Sep 24, 2010 | Computers & Internet

### 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

### Angle of alevation

height =50
length = 60
angle=x

tangent(x)=50/60
tangent(x)=0.833
x=39.8 degree

Mar 01, 2009 | Super Tutor Trigonometry (ESDTRIG) for PC

Shadows, especially circular shadows, are pretty common with the pop-up flash. What you are seeing is actually the shadow cast by the end of the lens. This happens especially on wider angle shots.

The solution is to find a way to get the lens out of the way of the flash. You can get an external flash, like a 430ex or 580ex, which elevates the flash far above the lens. That is an expensive option so first you might try making a diffuser for your pop up flash, which softens the source of light and helps eliminate some shadows:

http://www.diyphotography.net/diy-built-in-pop-up-flash-diffuser

http://www.flickr.com/photos/natuurplaat/10362363/

Dec 25, 2007 | Canon Rebel XT / EOS 350D Digital Camera

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