PardekooperPardekooper

PardekooperPardekooper

line of s

ight

angle of depression

ROO

Mint

PardekooperPardekooper

line of sight

angle of elevation

PardekooperPardekooper

A 98-ft extension ladder rest on top of a hook and ladder truck with its base 11 ft from the ground. When the angle of elevation of the ladder

is 73o, how high up the building will it reach ?

98

11

73o

x€

sinθ =opposite

hypotenuse

€

sin 73 =x

98

€

98sin 730 = x

€

94 = x

11+x=height11+94=height

105ft=height

xxxxx

989898989898

The altimeter of a jet airplane approaching O’Hare Airport in Chicago records 5900ft as it passes over the sears Tower. At the same time, the angle of depression from the plane to the near end

of the runway is 5o. How far is the plane from the base of the Sears Tower to the end of the run way.

5900

5o

5900

x

€

tanθ =opposite

adjacent

€

tan 5 0 =5900

x

€

x tan 5 0 = 5900

€

x =5900

tan 5 0

€

x = 67437.3086

=67000ft or 67000/5280=13mi

€

x = 67000 ft

5900590059005900

xxxxx

PardekooperPardekooper

Here comes the assignment

PardekooperPardekooper

AssignmentWorkbook

Page 405 all