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)
Correct Answer: Option D
Explanation
x = 10 cot35o – 10 cot55o
= 10(cot35o – cot55o)