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Ludmilka [50]
3 years ago
7

I need your help with this problem

Mathematics
1 answer:
fenix001 [56]3 years ago
3 0

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

<h3>a)</h3><h3>cosФ = BD / AB</h3>

cos (90-25) = 900 / AB

0.423 = 900 /AB

AB = 2127.66 m

<h3>b)</h3><h3>sinФ = AD/AB</h3>

sin(90-25) = AD /2127.66

AD =  sin(90-25) x 2127.66

AD = 1928.31m

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