Posted by **Barb** on Wednesday, November 28, 2012 at 11:43pm.

angles of elevation to an airplane are measured from the top and the base of a building that is 40 m tall. The angle from the top of the building is 31°, and the angle from the base of the building is 40°. Find the altitude of the airplane. (Round your answer to two decimal places.)

- trig -
**Steve**, Thursday, November 29, 2012 at 5:28am
measured from the plane, the building subtends an angle of 9°

the distance d from the top of the building to the plane is found by

d/sin50° = 40/sin9°

d = 195.87

now, knowing d, the height h of the plane can be found:

(h-40)/d = sin31°

(h-40)/195.87 = sin31°

h = 40 + 195.87 sin31°

h = 140.88

h =

## Answer This Question

## Related Questions

- Pre-Cal - Angles of elevation to an airplane are measured from the top and the ...
- TRIG WORD PROBLEMS - from 25 feet away from the base of a building, the angle of...
- trig - The angle of elevation to the top of a very tall Building is found to be ...
- trig - The angle of elevation to the top of a very tall Building is found to be ...
- trig - The angle of elevation to the top of a very tall Building is found to be ...
- Maths - Standing on top of a slope of 5 degrees, i see the top of a building and...
- Pre-Calculus - 1.The angle of elevation to top of a building from a point on the...
- trig - Question Part Points Submissions Used The angle of elevation to the top ...
- Trig - From a point A on the ground, the angle of elevation to the top of a tall...
- Trigonometry - a flagpole 25 feet tall stands on a top of a building. from a ...

More Related Questions