Are Length & Area of a sec
Circumference: (=2Ar Are
Ctd
, Ex. A radio tower: 400ft from a building.
Angle of elevation to the top of tower is 36°.
Angle of depression to the bottom is 23°. How tall is tower? O
2
36
400
✗2 tan 1361= 4%0
736° 400ft 40ft
6 ✗e- 400 tan/365
t
123° 23
l
400 a
✗ = 400tan/231+400 tan/36) 23°
%
12460.4069ft tan/231=4'
. tan/23)
✗F
Ex#2. 500ft from base of a building
Angle of elevation is 36, Angle of elevation is 38
Circumference: (=2Ar Are
Ctd
, Ex. A radio tower: 400ft from a building.
Angle of elevation to the top of tower is 36°.
Angle of depression to the bottom is 23°. How tall is tower? O
2
36
400
✗2 tan 1361= 4%0
736° 400ft 40ft
6 ✗e- 400 tan/365
t
123° 23
l
400 a
✗ = 400tan/231+400 tan/36) 23°
%
12460.4069ft tan/231=4'
. tan/23)
✗F
Ex#2. 500ft from base of a building
Angle of elevation is 36, Angle of elevation is 38
