Answer:
a) distance from plane to swimmer = 2127.66 m
b) distance from swimmer to point D = 1928.31 m
Step-by-step explanation:
Given the question,
height at which the plane is = 900m
angle of depression = 25°
If we closely observe, the whole scene is making an right angle triangle
So, we can use trigonometry identities
a)
cosФ = BD / AB
cos (90-25) = 900 / AB
0.423 = 900 /AB
AB = 2127.66 m
b)
sinФ = AD/AB
sin(90-25) = AD /2127.66
AD = sin(90-25) x 2127.66
AD = 1928.31m
