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Formulas:

Evaluating with logarithms.-

Trigonometric ---
45-degree angle functions -
Fractions:

Addition of..
Conversion of
Division of
Multiplication of..
Reduction to lowest terms

Subtraction of..
Fuel consumption graph.--
Functions:

Of circles..
Of 30, 45, and 60-degree angles.

Trigonometric ---
Geometry—See Plane Geometry, Solid

Geometry, and Spherical Geometry
Graphs.---

Air-speed meter calibration...
Axes and points --
Construction.
Examples
From equations.
Pressure-temperature-
Reading---
Sunset -

Used to solve equations containing two unknowns.
Great circle_.

Distance
Greenwich meridian.
Ground speed:

Definition.

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Vector.

45a, b; 46; 47; 48

76, 76

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Division...
Extraction of roots.
Evaluation of formulas.
Multiplication..

79
81
83
79

128
130
133
128

Paragraph

84

Page
135
129
132
124
126
125
123
124
129
123
165
106
124
48

2
105
12
48
6

80
82
74a
78
77
73
75
80

72
App. II
62a (5)

75
30a

2
62a (3)

7h
29a

ba
11a
23a
17a
96
79
88

Logarithms—Continued.
Applications to Continued.

Oblique-triangle problems.
Powers of numbers ---

Right-triangle problems -
Characteristic: -

Negative
Interpolation.--
Introduction to.
Mantissa.-
Powers of numbers -
Purpose--

Tables of
Longitude-
Mantissa.
Maps
Materials needed..
Meridian.--
Mixed numbers.
Models ---
Multiplication:-

Of fractions
Of polynomials
Of positive and negative numbers.
With E-6B computer.-

With logarithms...
Napier's rule.--
Oblique triangles solved:

By right-triangle methods -

With logarithms.---
Obtuse spherical triangle, solution of
Parabola..
Parallelogram.
Percent.
Perpendicular:

At a point, construction of
From a point, construction of

To a segment, construction of..
Plane geometry:.

Circles, special properties of
Constructions with rule and compasses -
Definition.
Elements of..--.
Miscellaneous figures, special properties of -
Plane intersecting sphere-
Quadrilaterals, special properties of_
Relationship between two triangles -

22

38
30
149
128
141

70
84
90

586
57a (2)

8e
52h
53f
539

53c
50-60

56

117
135
143
97
95
16
81
84
84
83
79
92
82
79
80
97
102
95
90
88

53

Triangles, special properties of -
Plane trigonometry:

Complementary angles -
Formulas, basic---
Functions of angles --
Functions of 30°, 45°, and 60° angles -

51
52
58
60
57
55
54

66
64
640
65

111
108
109
109

69

14

Page
115
126
113
112
104
28
29
30
30
29
81
104
76
79
129

55
106
98

619
47a

38e

Plane trigonometry-Continued.

Paragraph
Interpolation..
Right-triangle methods used in solving obtuse triangles --- 78
Right-triangles, solution of..

68
Tables, use of..

67
Pole of a circle..

6le
Positive and negative numbers.
Addition of..

15
Division of

17c
Multiplication of

17a
Subtraction of..

16a
Polygon:

52i
Spherical..
Polyhedron.-
Postulate

510
Powers of numbers and logarithms.

80
Pressure-temperature graph.--

345
Prime meridian.

62a (4)
Prism..

59a (1)
Properties, special, of:
Circles.-

56
Quadrilaterals.

57
Triangles.-

54
Proportion.---

13
Protractor, use of.---
Quadrant.

56a (3); 61a
Quadrilaterals

57
Quotient.

7a
Ratio -

13a
Rectangle..

56a (4)
Regional charts

306
Resultant, vector diagram.

43a
Rhombus.--

-57a (3)
Right spherical triangles, solution of...

91
Right triangle:
Definition..

54a (4)
Method applied to obtuse spherical triangles -

70
Solution of...

68
By logarithms.---

82
Scalene triangle-

54a (1)
Scales.

28-31
Secant.-

56a (7); 64c
Sectional charts..

306
Segment.--

52a
Semicircle.

56a (2)
Similar triangles.-

55c
Sine.--

640
60 angle function.

65
Small circle

60a (2)
Solid geometry-
Sphere...

59d; 866 (1)
Intersected by plane-

60

92
95
88
24

64
92, 103

95

9
24
92
49
67
95
143

88
117
113
132
88

48
92, 109

49
80
92
91
109
109
103

98
101, 138

102

59

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Spherical:

Angles --
Geometry -
Polygon..
Triangles.-

Rules --
Trigonometry:

Astronomical triangles --
Definitions-
Laws, general.
Napier's rule..
Properties of a sphere
Rules for solving spherical triangles --

Solution of obtuse right spherical triangles.
Square
Square law, right triangles..
Square root-
Subtraction.

Of fractions.
Of polynomials.-

Of positive and negative numbers.
Sum of angles of triangle..
Sunset graphs..

86
87

91
56a (5)

54
18

143
141
138
139
143
92
88
31
4

5

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Symbols..

4c, 6c, 7e, 13d, 140

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90

88
103,
138, 91
104, 138

Similar.

61, 86, 550
Spherical

61h; 866 (5)
Trigonometric tables.--

App. II
Interpolation.--

69
Use of..

67
Trigonometry-See Plane Trigonometry and Spherical Trigo-

nometry.

165
115
112

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G. C. MARSHALL,

Chief of Staff.
OFFICIAL:
J. A. ULIO,
Major General,

The Adjutant General.
DISTRIBUTION:

R and H 1 (6); 4, 44, (5); IBn 1, 4, 44 (10).
(For explanation of symbols see F M 21-6.)

U. S. GOVERNMENT PRINTING OFFICE: 1949

For sale by the Superintendent of Documents, Washington, D. C.

Price 25 cents

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