Elements of Surveying and Leveling: With Descriptions of the Instruments, and the Necessary TablesA.S.Barnes, 1871 - 161 páginas |
Dentro del libro
Resultados 1-5 de 45
Página 38
... tangent of an arc is the line which touches it at one extremity , and limited by a line drawn through the other extremity and the centre of the circle . Thus , AC is the tan- gent of the arc AB . 43 53. The secant of an arc is the line ...
... tangent of an arc is the line which touches it at one extremity , and limited by a line drawn through the other extremity and the centre of the circle . Thus , AC is the tan- gent of the arc AB . 43 53. The secant of an arc is the line ...
Página 39
... tangent of EB , is called the cotangent of AB ; IB , the sine of EB , is the cosine of AB ; OT , the secant of EB , is the cosecant of AB . In general , if A is any arc or angle , we have , COS A sin ( 90 ° = - A ) cot A = tan ( 90 ...
... tangent of EB , is called the cotangent of AB ; IB , the sine of EB , is the cosine of AB ; OT , the secant of EB , is the cosecant of AB . In general , if A is any arc or angle , we have , COS A sin ( 90 ° = - A ) cot A = tan ( 90 ...
Página 40
... tangent , or cotangent of any given angle . 59. If the angle is less than 45 ° , look for the degrees in the first horizontal line of the different pages : when the degrees are found , descend along the column of minutes , on the left ...
... tangent , or cotangent of any given angle . 59. If the angle is less than 45 ° , look for the degrees in the first horizontal line of the different pages : when the degrees are found , descend along the column of minutes , on the left ...
Página 41
... tangent , or cotangent of the remainder , or supplement . Column of Differences . 61. The column of the table next ... tangents and cotangents . The column D , between the D , after the column cosine , and of the column D , between the ...
... tangent , or cotangent of the remainder , or supplement . Column of Differences . 61. The column of the table next ... tangents and cotangents . The column D , between the D , after the column cosine , and of the column D , between the ...
Página 42
... tangent of an arc , in which there are seconds , is found in a manner entirely similar . In regard to the cosine and cotangent , it must be remembered , that they increase while the arcs decrease , and decrease as the arcs are increased ...
... tangent of an arc , in which there are seconds , is found in a manner entirely similar . In regard to the cosine and cotangent , it must be remembered , that they increase while the arcs decrease , and decrease as the arcs are increased ...
Otras ediciones - Ver todas
Términos y frases comunes
Applying logarithms axis azimuth back-sight base-line bearing chord clamp-screw column compass contour lines corresponding Cosine Cosine D Cotang course curve decimal degree of curvature degrees determined difference of level divided double meridian distance draw drawn east error example feet field-notes fore-sight given angle given line given point ground height of instrument hence horizontal angles horizontal distance horizontal plane inch intersection latitude and departure length limb line of collimation M.
M. Sine mantissa marked measured method multiplied notes offsets paper parallel passing perpendicular plane of reference plot position prismoid protractor radius reading right angles scale of equal screws secant side sights Sine D slope spider's lines stakes station subtract surface survey taken Tang tangent theodolite traverse vernier plate vertical plane wwwwwwwww yards
Pasajes populares
Página 56 - ... the square of the hypothenuse is equal to the sum of the squares of the other two sides.
Página 12 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Página 17 - The minutes in the left-hand column of each page, increasing downwards, belong to the degrees at the top ; and those increasing upwards, in the right.hand column, belong to the degrees below.
Página 37 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, etc.
Página 12 - The logarithm of a quotient is equal to the logarithm of the dividend minus the logarithm of the divisor.
Página 10 - When a number lies between 1 and 10, its logarithm lies between 0 and 1; that is, it is equal to 0, plus a decimal; if a number lies between 10...
Página 9 - The logarithm of a number is the exponent of the power to which it is necessary to raise a fixed number, in order to produce the first number.
Página 11 - The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers.
Página 130 - MC; hence, the double meridian distance of a course is equal to the double meridian distance of the preceding course, plus the departure of that course, plus the departure of the course itself : if .there is no preceding course, the first two terms become zero.
Página 38 - The secant of an arc is the line drawn from the centre of the circle through one extremity of the arc, and limited by the tangent passing through the other extremity. Thus, 00 is the secant of the arc AB.