A Treatise on Practical Surveying: Which is Demonstrated from Its First Principles, Wherein Every Thing that is Useful and Curious in that Art, is Fully Considered and ExplainedF. Lucas, Jun. and Joseph Cushing, 1816 - 472 páginas |
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... secants . The second section contains plane trigonometry right angled and oblique , with its application in determining the measures of inaccessible heights and distances . The third section gives an account of the chains and measures ...
... secants . The second section contains plane trigonometry right angled and oblique , with its application in determining the measures of inaccessible heights and distances . The third section gives an account of the chains and measures ...
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... Secants . DEFINITION . SURVEYING , is that art which enables us to give a plan , or just representation , of any piece or parcel of land and to determine the content thereof , in such measure as is agreeable and customary to the country ...
... Secants . DEFINITION . SURVEYING , is that art which enables us to give a plan , or just representation , of any piece or parcel of land and to determine the content thereof , in such measure as is agreeable and customary to the country ...
Página 58
... secant , and CI its co- secant . fig . 8 . O fig . 8 . D 1K F H H B E 1. The co - sine of an arc is to the sine , as radius is to the tangent . 2. Radius is to the tangent of an arc , as the co - sine of it is to the sine . 3. The sine ...
... secant , and CI its co- secant . fig . 8 . O fig . 8 . D 1K F H H B E 1. The co - sine of an arc is to the sine , as radius is to the tangent . 2. Radius is to the tangent of an arc , as the co - sine of it is to the sine . 3. The sine ...
Página 59
... secant . 7. The sine of an arc is to radius , as the tangent is to the secant . The triangles CLH and CBK , being similar . ( by theo . 16. ) 1. CL : LH :: CB : BK . 2. Or , CB : BK : : CL : LH . The triangles CFH and CDI , being ...
... secant . 7. The sine of an arc is to radius , as the tangent is to the secant . The triangles CLH and CBK , being similar . ( by theo . 16. ) 1. CL : LH :: CB : BK . 2. Or , CB : BK : : CL : LH . The triangles CFH and CDI , being ...
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... of these ADB be added ; then DEA + ADB + DBC = ABCDE = ( DHA + ABD + DFB ) = DHF . PROB . XX To project the lines of chords , sines , tangents , and secants , to any radius . fig . 60 . 30 20 10 40 50 70 80 10 20 30 74 PROBLEMS .
... of these ADB be added ; then DEA + ADB + DBC = ABCDE = ( DHA + ABD + DFB ) = DHF . PROB . XX To project the lines of chords , sines , tangents , and secants , to any radius . fig . 60 . 30 20 10 40 50 70 80 10 20 30 74 PROBLEMS .
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A Treatise of Practical Surveying: Which is Demonstrated From Its First ... Robert Gibson Sin vista previa disponible - 2021 |
Términos y frases comunes
20 perches 50 Dist ABCD acres altitude annexed Answer base bearing bisect blank line centre chains and links chord circle circumferentor Co-secant Secant Co-sine Co-tang column contained cyphers decimal decimal fraction Dep Lat difference divided divisor draw east edge EXAMPLE feet field-book figures four-pole chains given angle half the sum height Hence hypothenuse inches instrument latitude length logarithm magnetical measure meridian distance multiplied needle number of degrees object off-sets parallel parallelogram perpendicular piece of ground plane Portmarnock PROB proportion protractor quotient radius right angles right line scale of equal SCHOLIUM sect semicircle side sights sine square root stationary distance sun's suppose survey taken tance Tang tangent thence theo theodolite THEOREM thro trapezium triangle ABC trigonometry true amplitude true azimuth two-pole chains vane variation whence