2.
Sample answer: An angle of elevation is called
that because the angle formed by a horizontal line
and a segment joining two endpoints rises above
the horizontal line.
3.
The angle of depression is
/
FPB
and the angle of
elevation is
/
TBP
.
4.
AC
is 50 miles or 50(5280)
5
264,000 feet.
Let
x
represent
m
/
CAB
.
tan
x
°
¬
5
}
C
AC
B
}
tan
x
°
¬
5
}
2
1
6
0
4
,0
,0
0
0
0
0
}
x
¬
5
tan
2
1
1
}
2
1
6
0
4
,0
,0
0
0
0
0
}
2
x
¬
<
2.2
The angle of elevation should be about 2.2°.
5.
Let
x
represent
m
/
ACB
.
tan
x
°
¬
5
}
B
AB
C
}
tan
x
°
¬
5
}
1
7
8
.6
.2
}
x
¬
5
tan
2
1
1
}
1
7
8
.6
.2
}
2
x
¬
<
22.7
The angle of elevation is 22.7°.
6.
The angle of depression between the ship and the
horizontal is 13.25°. Find the length along the
ocean floor.
The ocean floor and the horizontal level with the
ship are parallel, creating congruent alternate
interior angles
/
BAC
and
/
ACD
.
tan13.25°
¬
5
}
D
40
C
}
DC
tan13.25°
¬
5
40
DC
¬
5
}
tan1
4
3
0
.25°
}
DC
¬
<
169.9
The diver must walk about 169.9 meters along
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This note was uploaded on 12/19/2011 for the course MAC 1140 taught by Professor Dr.zhan during the Fall '10 term at UNF.
 Fall '10
 Dr.Zhan
 Calculus, PreCalculus

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