Plane [and Spherical] Trigonometry for Colleges and Secondary SchoolsLongmans, Green, and Company, 1908 |
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Página 1
... known as Common logarithms or as Briggs's logarithms , in order to distinguish them from another system , which is also a modified form of Napier's system . The logarithms of this other modified system are frequently employed in ...
... known as Common logarithms or as Briggs's logarithms , in order to distinguish them from another system , which is also a modified form of Napier's system . The logarithms of this other modified system are frequently employed in ...
Página 13
... known and will be taken for granted . ( a ) In a right - angled triangle the square of the measure of the hypotenuse is equal to the sum of the squares of the measures of the other two sides . ( b ) The ratio of the length of any circle ...
... known and will be taken for granted . ( a ) In a right - angled triangle the square of the measure of the hypotenuse is equal to the sum of the squares of the measures of the other two sides . ( b ) The ratio of the length of any circle ...
Página 14
... known that the diameter of a certain circle does not differ from 100 ft . by more than 2 in . What will be the outside limits of the error made in calculating the area when the diameter is taken as 100 ft . ? 5. Find the difference ...
... known that the diameter of a certain circle does not differ from 100 ft . by more than 2 in . What will be the outside limits of the error made in calculating the area when the diameter is taken as 100 ft . ? 5. Find the difference ...
Página 16
... known . * This is one of the methods which will be employed in this book in prob- lems involving distance . Proficiency in drawing will be very helpful to the student . 10. ] EXAMPLES . EXAMPLES . 17 1. When an 16 [ C.IIH . II . PLANE ...
... known . * This is one of the methods which will be employed in this book in prob- lems involving distance . Proficiency in drawing will be very helpful to the student . 10. ] EXAMPLES . EXAMPLES . 17 1. When an 16 [ C.IIH . II . PLANE ...
Página 21
... known as the trigonometric ratios of the angle A. According to the definition of a ratio ( Art . 8 ) they are merely numbers . For brevity they are written sin A , cos A , tan A , * In Chapter V. the trigonometric ratios are defined for ...
... known as the trigonometric ratios of the angle A. According to the definition of a ratio ( Art . 8 ) they are merely numbers . For brevity they are written sin A , cos A , tan A , * In Chapter V. the trigonometric ratios are defined for ...
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Términos y frases comunes
A+B+C acute angles algebraic centre CHAPTER circumscribing computation construction cos² cosec cosine cotangent deduced definitions denoted derived diedral angle draw equal equation EXAMPLES expression figure formulas geometry height Hence hypotenuse included angle inscribed circle intersection isosceles triangle law of cosines law of sines length logarithms M₁ method negative NOTE number of degrees number of sides OP₁ opposite perpendicular Plane Trigonometry polar triangle pole positive angles quadrant QUESTIONS AND EXERCISES radian measure radius regular polygon relations respectively revolving right angles right-angled triangle sec² secant Show shown sides and angles sin² sine solid angle Solve ABC sphere spherical angle spherical degrees spherical excess spherical polygon spherical triangle spherical trigonometry subtended tan² tangent terminal line tower triangle ABC triedral trigono trigonometric functions trigonometric ratios whole number
Pasajes populares
Página 35 - 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...
Página 25 - I. The sine of the middle part is equal to the product of the tangents of the adjacent parts.
Página 87 - 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...
Página 85 - 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.
Página 55 - 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...
Página 111 - The ratio of a circumference of a circle to its diameter is the same for all circles. [See Art. 9 (6).] For the proof of (a), reference may be made to any plane geometry ; for instance, to Euclid VI., 33.* The proof of (6) is not contained in all geometries ; for instance, Euclid does not give...
Página 183 - The area of a regular polygon inscribed in a circle is a geometric mean between the areas of an inscribed and a circumscribed regular polygon of half the number of sides.
Página 41 - 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.