Friday

January 30, 2015

January 30, 2015

Posted by **Anonymous** on Saturday, December 12, 2009 at 5:39pm.

the building and measured an angle of 38 degrees to the top of the building. He then

walked 100 feet further away from the building and measured an angle of 34 degrees to

the top.

How tall is the building?

I know I'm suppose to use tan

I got tan38=y/x from the first part of the information. I need help getting the second part

- Math -
**Reiny**, Saturday, December 12, 2009 at 7:04pmfrom the outer triangle

tan 34 = y/(x+100)

y = (x+100)tan 34

from your equation

y = xtan 38

so xtan 38 = (x+100)tan 34

xtan 38 = xtan 34 + 100tan 34

xtan 38 - xtan 34 = 100tan 34

x(tan 38 - tan 34) = 100tan 34

x = 100tan 34/(tan 38 - tan 34)

once you found x, you can find y using your first equation.

- Math -
**unique**, Monday, January 12, 2015 at 8:32pmyou should help me mines is kinda like that and i dont understand it

**Answer this Question**

**Related Questions**

Math - A surveyor, standing 80 ft. from the base of a building, measures the ...

MATH help needed asap - A surveyor, standing 80 ft. from the base of a building...

maths - a chimney of 20m height standing on the top of a building subtends an ...

Math 11 - Chung-ho is standing on the top of a building that is 135 m talk. The ...

math - A flagpole and a building stands on the same horizontal level.From the ...

geometry - chung ho is standing on the top of a building that is 135m tall. The ...

geometry ( trigonometric ratios) - a girl who is standing 92 ft away from a ...

Precalculus - To estimate the height of a building, two students find the angle ...

pre calc - from a distance of 50 feet from the base building, the angle of ...

Trig - From a point A on the ground, the angle of elevation to the top of a tall...