The angle of depression of a car C, from the top of the building of height 100m is

a) Calculate the distance between the car and the foot of the building?

b) Calculate the angle of elevation of the top of the building from a point D which is 100m from C as shown?​

a) 148.26 m

b) 21.94 degrees

Step-by-step explanation:

a)

tan 56 = 100/x

1.4826 = 100/x

x = 148.26

b)

148.26 + 100 = 248.26

tan y = 100/248.26

tan y = 0.4028

y = 21.94 degrees

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

a

step-by-step explanation:

the answer is a