A system of popular trigonometry1835 |
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Página vii
... difference of their logarithms , 7 . ART . 5. The logarithm of the power of any number is equal to the logarithm of the number multiplied by the index of the power , 8 . ART . 6. The logarithm of the root of any number is equal to the ...
... difference of their logarithms , 7 . ART . 5. The logarithm of the power of any number is equal to the logarithm of the number multiplied by the index of the power , 8 . ART . 6. The logarithm of the root of any number is equal to the ...
Página viii
... difference between the lesser and mean , the mean may be found , 29 . ART . 10. Given the three sides of a triangle , we may find its area , 31 . PLANE TRIGONOMETRY . DEF . I. The tangent of an arch , or angle , is that portion of the ...
... difference between the lesser and mean , the mean may be found , 29 . ART . 10. Given the three sides of a triangle , we may find its area , 31 . PLANE TRIGONOMETRY . DEF . I. The tangent of an arch , or angle , is that portion of the ...
Página ix
... difference of the two rectangles under the sine of each and the cosine of the other , 49 . ART . 92. The rectangle under the radius and the cosine of the sum of two angles is equal to the difference of the rectangles under the cosines ...
... difference of the two rectangles under the sine of each and the cosine of the other , 49 . ART . 92. The rectangle under the radius and the cosine of the sum of two angles is equal to the difference of the rectangles under the cosines ...
Página x
... difference , as the sum of the opposite sides is to their difference , 75 . ART . 20. In a triangle the cosine of any angle multiplied by twice the product of the sides which contain it , is equal to the sum of the squares of those ...
... difference , as the sum of the opposite sides is to their difference , 75 . ART . 20. In a triangle the cosine of any angle multiplied by twice the product of the sides which contain it , is equal to the sum of the squares of those ...
Página 7
... difference of their logs . Let n , n ' , be any two numbers , l , l ' their logs . Then log . ( 2 ) = = 1 − 1 . n ' - DEM . If r be the base , then r = n , and r " = n ' . Consequently n η - pl But , by ART . 37 , AL . , Therefore , pl ...
... difference of their logs . Let n , n ' , be any two numbers , l , l ' their logs . Then log . ( 2 ) = = 1 − 1 . n ' - DEM . If r be the base , then r = n , and r " = n ' . Consequently n η - pl But , by ART . 37 , AL . , Therefore , pl ...
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Palavras e frases frequentes
ABCD AC AC algebraical quantities angle ACD angle bac angle is equal angular CD² centre compute Consequently corresponding cos² cosec cosine of ACD cotan determine the magnitude dicular DIONYSIUS LARDNER divided EFGH equal to half equal to one-third equation figure formula GEOM geometric series geometrical given angle goniometrical circle goniometrical lines half a right Hence inasmuch inscribed square length Let ACD likewise linear unit logarithms means opposite parallelopiped perpen perpendicular plane ABO prec radius ratio rectangle respectively right angle right-angled triangle sec² secant sides and angles sin² sine of ACD sphere submultiple subtractive supplementary angles suppose tan² tangent third side three sides Treatise triangle ABC TRIGONOMETRY
Passagens conhecidas
Página 110 - PRINCIPLES OF GEOMETRY, familiarly Illustrated, and applied to a variety of useful purposes. Designed for the Instruction of Young Persons.
Página 111 - I vol. 8vo. THE STEAM ENGINE. Explained and illustrated in a familiar style, with its application to the Arts and Manufactures, more especially in transport by Land and Water ; with some account of the Rail Roads now in progress in various parts of the World. By the Rev. DIONYSIUS LARDNER, LL.
Página vi - The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers.
Página iii - A straight line is said to be perpendicular to a plane when it is perpendicular to every straight line which passes through its foot in that plane, and the plane is said to be perpendicular to the line.
Página 5 - Now, we know that the three angles of any triangle, taken together, are equal to two right angles...
Página 110 - Dr. Ritchie's little elementary work is excellently well adapted to its object. It is brief, plain, and full of all that is necessary : curious and useful in its application ; and beyond any other of the kind now existent in its familiar and distinct explanation of some of the instruments required in the practical application of the principles laid down and demonstrated.
Página 53 - We have, then, that the sine of an angle is equal to the cosine of its complement, and conversely.
Página iii - THEOREM. Every section of a sphere, made by a plane, is a circle.
Página 37 - The sum of the squares of the sine and cosine of an angle is...