A Treatise of Plane Trigonometry: To which is Prefixed a Summary View of the Nature and Use of Logarithms : Being the Second Part of a Course of Mathematics, Adapted to the Method of Instruction in the American Colleges |
From inside the book
Results 1-5 of 25
Page 7
... ratio . But the logarithm of this product is the sum of the logarithms of the preceding term and the ratio ; that is , the logarithms increase by a common addition , and are , therefore , in arith- metical progression . ( Alg . 422 ...
... ratio . But the logarithm of this product is the sum of the logarithms of the preceding term and the ratio ; that is , the logarithms increase by a common addition , and are , therefore , in arith- metical progression . ( Alg . 422 ...
Page 37
... ratio of the births , and the ratio of the deaths , when compared with the whole population . Ex . 10. If the population of a country , at any given time , be ten millions ; and the ratio of the annual number of births to the whole ...
... ratio of the births , and the ratio of the deaths , when compared with the whole population . Ex . 10. If the population of a country , at any given time , be ten millions ; and the ratio of the annual number of births to the whole ...
Page 38
... ratio of the births and that of the deaths , the whole rate of increase will be obtained . Ex . 11. If in a country , the ratio of births be 309 and if the population this be 20 years hence ? the ratio of deaths 1 the ratio of ...
... ratio of the births and that of the deaths , the whole rate of increase will be obtained . Ex . 11. If in a country , the ratio of births be 309 and if the population this be 20 years hence ? the ratio of deaths 1 the ratio of ...
Page 45
... ratio of the logarithms of two numbers to each other , is the same in one system as in another . If N and n be the two numbers ; Then , Therefore , 1.N : V.N :: M : M ' l.n l'.n : M : M ' 1.N : l.n :: l'.N ; l'.n . COMPUTATION OF ...
... ratio of the logarithms of two numbers to each other , is the same in one system as in another . If N and n be the two numbers ; Then , Therefore , 1.N : V.N :: M : M ' l.n l'.n : M : M ' 1.N : l.n :: l'.N ; l'.n . COMPUTATION OF ...
Page 50
... ratio to each other , as the arcs on which they stand . Thus the arc AB , ( Fig . 2. ) is a measure of the angle ACB . It is immaterial what is the size of the circle , provided it cuts the lines which include the angle . Thus the angle ...
... ratio to each other , as the arcs on which they stand . Thus the arc AB , ( Fig . 2. ) is a measure of the angle ACB . It is immaterial what is the size of the circle , provided it cuts the lines which include the angle . Thus the angle ...
Other editions - View all
A Treatise of Plane Trigonometry: To Which Is Prefixed, a Summary View of ... Jeremiah Day No preview available - 2017 |
A Treatise of Plane Trigonometry: To Which Is Prefixed, a Summary View of ... Jeremiah Day No preview available - 2018 |
A Treatise of Plane Trigonometry: To Which Is Prefixed a Summary View of the ... Jeremiah Day No preview available - 2018 |
Common terms and phrases
ABC Fig ABCD altitude axis base breadth bung diameter calculation cask circle circular sector circular segment circumference column cosecant cosine cotangent course cube cubic decimal departure Diff difference of latitude difference of longitude distance divided earth equal to half equator figure find the area find the SOLIDITY frustum given sides gles greater hypothenuse inches inscribed lateral surface length less logarithm longitude measured Mercator's meridian meridional difference middle diameter miles multiply the sum number of degrees number of sides oblique parallelogram parallelopiped perpendicular perpendicular height plane sailing prism PROBLEM proportion pyramid quadrant quantity quotient radius ratio regular polygon right angled triangle right cylinder rods rule secant sector segment ship sine sines and cosines slant-height sphere spherical subtract tables tangent term theorem trapezium triangle ABC Trig trigonometry wine gallons zone
Popular passages
Page 81 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
Page 43 - A cone is a solid figure described by the revolution of a right angled triangle about one of the sides containing the right angle, which side remains fixed.
Page 50 - The surface of a sphere is equal to the product of its diameter by the circumference of a great circle.
Page 55 - ... the square of the hypothenuse is equal to the sum of the squares of the other two sides.
Page 69 - It will be sufficient to lay the edge of a rule on C, so as to be parallel to a line supposed to pass through B and D, and to mark the point of intersection G. 126. If after a field has been surveyed, and the area computed, the chain is found to be too long or too short ; the true contents may be found, upon the principle that similar figures are to each other as the squares of their homologous sides.
Page 118 - The sum of any two sides of a triangle is to their difference, as the tangent of half the sum of the angles opposite to those sides, to the tangent of half their difference.
Page 89 - Divide the height of the segment by the diameter of the circle ; look for the quotient in the column of heights in the table ; take out the corresponding number in the column of areas ; and multiply it by the square of the diameter.