Question

From the stake in the ground the angle of elevation of the connection with the tree is 42º. Find to the nearest tenth of a foot, the height of the connection point on the tree.

Answer 1

Answer:

Step-by-step explanation:

tan45

o

=

BC

AC

1=

BC

80

BC=80cm

tan30

o

=

BC+CE

DE

3

1

=

80+x

80

80+x=80

3

x=80

3

−80

x=80(

3

−1)m

The bird travelled 80(

3

−1)m

Speed of bird =

Time

Distance

=

2

40(

3

−1)

=40(

3

−1)m/s

∴ Speed =40(

3

−1)m/