The pilot of an aeroplane, flying 10km above the ground in the direction of a landmark, views the landmark to have angles of depression of 35o and 55o. Find the distance between the two points of observation
A
10(sin 35o - sin 55o)
B
10 cos35o - cos 55o
C
10(tan35o - tan55o)
D
10(cot35o - cot55o)
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
x = 10 cot35o - 10 cot55o
= 10(cot35o - cot55o)
Source: Myschool Past Questions Archive (Record #31598)