Plane TrigonometryLongmans, Green, and Company, 1906 |
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Page v
... contain a great variety of matters which it is impossible to consider in the time usually assigned to this study in school and college . On the other hand , the expla nations given in many other works are so meagre that the stu- dent is ...
... contain a great variety of matters which it is impossible to consider in the time usually assigned to this study in school and college . On the other hand , the expla nations given in many other works are so meagre that the stu- dent is ...
Page vi
... contain little more about trigonometric ratios and angular analysis than is sufficient to enable the beginner to understand clearly the arithmetical part of the science , and its simple practical applica- tions . This arrangement seems ...
... contain little more about trigonometric ratios and angular analysis than is sufficient to enable the beginner to understand clearly the arithmetical part of the science , and its simple practical applica- tions . This arrangement seems ...
Page xi
... contains the others 50. Ratios of an angle in terms of the ratios of its half angle · 51. Tangents of the sum and difference of two angles , and of twice an angle 52. Sums and differences of sines and cosines · *** ** 89 90 90 92 93 ...
... contains the others 50. Ratios of an angle in terms of the ratios of its half angle · 51. Tangents of the sum and difference of two angles , and of twice an angle 52. Sums and differences of sines and cosines · *** ** 89 90 90 92 93 ...
Page 1
... contains a chapter on logarithms . This brief introductory review is given merely for the purpose of bringing to mind the special properties of logarithms which make them readily adaptable to the saving of arithmetical work . A little ...
... contains a chapter on logarithms . This brief introductory review is given merely for the purpose of bringing to mind the special properties of logarithms which make them readily adaptable to the saving of arithmetical work . A little ...
Page 10
... contain 10 yards ? What fraction of 10 yards is 3 weeks ? When it is said that a line is ten inches long , this statement means that a line one inch long has been chosen for the unit of length , and that the first line contains ten of ...
... contain 10 yards ? What fraction of 10 yards is 3 weeks ? When it is said that a line is ten inches long , this statement means that a line one inch long has been chosen for the unit of length , and that the first line contains ten of ...
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Common terms and phrases
A+B+C acute angle algebraic centre CHAPTER circumscribing computation cos² cosec cotangent deduced denoted Derive diedral angle draw equal equator EXAMPLES expression figure Find the distance formulas geometry given Hence hypotenuse included angle inscribed circle intersection latitude law of cosines law of sines length logarithms mantissa mathematics meridian method NOTE number of degrees number of sides opposite perpendicular plane triangle Plane Trigonometry polar triangle pole positive quadrant radian measure radii radius regular polygon relations respectively right angles right triangles right-angled triangle secant Show sides and angles sin² solid angle solution Solve ABC sphere spherical angle spherical degree spherical excess spherical polygon spherical triangle spherical trigonometry subtended surface tables tan² tangent terminal line three angles tower triangle ABC trigono trigonometric functions trigonometric ratios π π
Popular passages
Page 52 - A sin B sin C Cosine Law: cos a = cos b cos c + sin b sin c cos A cos b = cos c cos a + sin c sin a cos B cos c = cos a cos b...
Page 42 - I. The sine of the middle part is equal to the product of the tangents of the adjacent parts.
Page 108 - The sum of the angles of a spherical triangle is greater than two and less than six right angles ; that is, greater than 180° and less than 540°. (gr). If A'B'C' is the polar triangle of ABC...
Page 74 - The area of the surface of a sphere is four times the area of a great circle.
Page 108 - In any triangle the square of any side is equal to the sum of the squares of the other two sides minus twice the product of these two sides and the cosine of their included angle.
Page 72 - The lateral area of a frustum of a cone of revolution is equal to one-half the sum of the circumferences of its bases multiplied by its slant height. Hyp. S is the lateral area, C and C...
Page 62 - Geometry that the area of a triangle is equal to one-half the product of the base by the altitude. Therefore, if a and b denote the legs of a right triangle, and F the area, F THE RIGHT TRIANGLE.
Page 128 - It follows that the ratio of the circumference of a circle to its diameter is the same for all circles.
Page 200 - Show that the area of a regular polygon inscribed in a circle is a mean proportional between the areas of an inscribed and circumscribing polygon of half the number of sides.
Page 202 - Find the area of a regular polygon of n sides inscribed in a circle, and show, by increasing the number of sides of the polygon without limit, how the expression for the area of the circle may be obtained. 13. (a) Find the distance at which a building 50 ft. wide will subtend an angle of 3'. (6) A church spire 45 ft. high subtends an angle of 9