Tables of Logarithms of Numbers and of Sines and Tangents for Every Ten Seconds of the Quadrant: With Other Useful TablesHarper & brothers, 1859 - 150 páginas |
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Página 96
... station from which the angle is to be measured ; then level the instrument by means of the screws , a , a , bringing the telescope over each pair alternately until the two spirit - levels on the vernier plate retain their position ...
... station from which the angle is to be measured ; then level the instrument by means of the screws , a , a , bringing the telescope over each pair alternately until the two spirit - levels on the vernier plate retain their position ...
Página 98
... station to the top of it . Ans . The height is 34.82 feet . Length of ladder , 39.20 feet . PROBLEM II . ( 144. ) To find the distance of a vertical object whose height is known . Measure the angle of elevation , and we shall have given ...
... station to the top of it . Ans . The height is 34.82 feet . Length of ladder , 39.20 feet . PROBLEM II . ( 144. ) To find the distance of a vertical object whose height is known . Measure the angle of elevation , and we shall have given ...
Página 99
... station to the object . Let C be the object inaccessible from A and B. Then , if the dis tance between the stations A and B be measured , SURVEYING . 99.
... station to the object . Let C be the object inaccessible from A and B. Then , if the dis tance between the stations A and B be measured , SURVEYING . 99.
Página 100
... station and the house ? The angle C is found to be 38 ° 43 ' . Then What was sin . A : BC = 612.38 ; sin . C : AB :: sin . B : AC = 593.09 . Ex . 2. Two ships of war , wishing to ascertain their distance from a fort , sail from each ...
... station and the house ? The angle C is found to be 38 ° 43 ' . Then What was sin . A : BC = 612.38 ; sin . C : AB :: sin . B : AC = 593.09 . Ex . 2. Two ships of war , wishing to ascertain their distance from a fort , sail from each ...
Página 101
... stations in a vertical plane pass- ing through the top of the object ; measure the distance be- tween the stations and the angle of elevation at each . If we measure the base AB , and the angles DAC , DBC , then , since CBA is the sup ...
... stations in a vertical plane pass- ing through the top of the object ; measure the distance be- tween the stations and the angle of elevation at each . If we measure the base AB , and the angles DAC , DBC , then , since CBA is the sup ...
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Términos y frases comunes
9 I I altitude angle of elevation arithm base chains circle Co-sine Co-tangent complement computed correction cosecant course and distance decimal diameter diff difference of latitude difference of longitude Dist divided equal equator fifth figure find the angles find the area find the Logarithm frustum given number given the angle height Hence horizontal plane hypothenuse inches latitude and departure length LO LO LO logarithmic sine measured meridian middle latitude miles minutes Multiply natural number nautical miles parallel parallel sailing perpendicular places plane sailing Prob Prop proportional quadrant radius Required the logarithmic right-angled spherical triangle right-angled triangle Sandy Hook secant ship sails side AC spherical triangle ABC SPHERICAL TRIGONOMETRY station subtract surface tabular number tang Tangent telescope theodolite Theorem vernier vertical Vulgar Fraction wyll yards zoids ΙΙ ΙΟ
Pasajes populares
Página 20 - The circumference of every circle is supposed to be divided into 360 equal parts, • called degrees, each degree into 60 minutes, and each minute into 60 seconds, etc.
Página 163 - In any spherical triangle, the sines of the sides are proportional to the sines of the opposite angles. In the case of right-angled spherical triangles, this proposition has already been demonstrated.
Página 69 - FIND the area of the sector having the same arc with the segment, by the last problem. Find also the area of the triangle, formed by the chord of the segment and the two radii of the sector.
Página 54 - 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.
Página 69 - TO THE NUMBER OF DEGREES IN THE ARC ; So IS THE AREA OF THE CIRCLE, TO THE AREA OF THE SECTOR.
Página 73 - To find the solidity of a pyramid. RULE. Multiply the area of the base by one third of the altitude.
Página vi - The characteristic of the logarithm of ANY NUMBER GREATER THAN UNITY, is one less than the number of integral figures in the given number.
Página 184 - If a heavy sphere, whose diameter is 4 inches, be let fall into a conical glass, full of water, whose diameter is 5, and altitude 6 inches ; it is required to determine how much water will run over ? AHS.