Wednesday

July 23, 2014

July 23, 2014

Posted by **Ghanny** on Monday, April 12, 2010 at 10:20am.

airplane flying?

- math help pls -
**Reiny**, Monday, April 12, 2010 at 11:12amDraw a triangle ABC , A and B the position of the observers and C the position of the plane.

Drop an altitude from C to AB, call it CD.

Label angle A as 51 and angle B as 40.5 degrees

Label AD as x, then DB = 5-x

In triangle ACD, cot51 = x/h

x = hcot51

In triangle DBC cot 40.5 = (5-x)/h

5-x = hcot40.5 or

x = 5 - hcot40.5

then hcot51 = 5-hcot40.5

hcot51 + hcot40.5 = 5

h = 5/(cot51 + cot40.5)

= .....

**Related Questions**

math - Two observers who are 5 km apart simultaneously sight a small airplane ...

math - Each of two observers 475 feet apart measures the angle of elevation to ...

Trig - Two observers 1 km apart spot an airplane. The angles of elevation of the...

Trigonometry - An observer (0) spots a plane flying at a 55 degree angle to his ...

physics - A loudspeaker is placed between two observers who are 111 m apart, ...

physics - A loudspeaker is placed between two observers who are 114 m apart, ...

Physics HELP!! - A loudspeaker is placed between two observers who are 113m ...

Physics - A skyrocket explodes 77 m above the ground. Three observers are spaced...

Geometry- trig ratio - An observer (o) spots a plane flying at a 55 degrees ...

mathemathics - an observer and a tree are standing against a slope. the observer...