Question

A point A is 10m away from a 10m tall building. Find the angle of elevation from A to the top of the building.

Answer 1

Answer:

In ΔBAP

tan30

o

=

AP

AB

⇒

3

1

=

x

10

x=10

3

m

Distance of building

Now,

In ΔPAD

tan45

o

=

AP

AD

1=

AP

AD

⇒x=AD=DB+BA

⇒10

3

=h+10

h=10

3

−10

=10(

3

−1)

h=10(1.732−1)

h=7.32m

Length of flag.