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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Página 93
... co - tangent and co - sine of any arc , may be had be the same method ; the complement of any degree , being only ... tang . of 29 ° . 50 ′ req . 20.00000 10.24148 9.75852 4. To find the secant by the help of a co - sine ; which may be ...
... co - tangent and co - sine of any arc , may be had be the same method ; the complement of any degree , being only ... tang . of 29 ° . 50 ′ req . 20.00000 10.24148 9.75852 4. To find the secant by the help of a co - sine ; which may be ...
Página 281
... tang . of the alt . :: tangent of the 6th arc 90 ° .00-10.00000 37.30-9.88498 23.58 0.64790 Co - sine of the sun's true azim . 70.04-9.53288 True azimuth S. 70 ° .04 ' E. Magnetical azimuth S. 51.00 E. Variation 19.04 W. The true ...
... tang . of the alt . :: tangent of the 6th arc 90 ° .00-10.00000 37.30-9.88498 23.58 0.64790 Co - sine of the sun's true azim . 70.04-9.53288 True azimuth S. 70 ° .04 ' E. Magnetical azimuth S. 51.00 E. Variation 19.04 W. The true ...
Página 305
... Co. tang . of A = s ; Co. tang . of B = r , and the perpendicular af = x ; then as 1 : x :: s : sx = Af ; and as 1 : x :: r : rx equal ab is - a - sx + rx and Bd ; therefore , fd , or its AB + ab = a¬1⁄2 sx + 1rx put ns - r ; and R for ...
... Co. tang . of A = s ; Co. tang . of B = r , and the perpendicular af = x ; then as 1 : x :: s : sx = Af ; and as 1 : x :: r : rx equal ab is - a - sx + rx and Bd ; therefore , fd , or its AB + ab = a¬1⁄2 sx + 1rx put ns - r ; and R for ...
Página 306
... Co. tang . = -1.471630 C = 138 ° 00 ′ its Co. tang . = -1.110606 therefore n = - . 638976 R = 50 , and 2 R = 1000 2 n R = 638.976 a = 42 and a2 = 1764.000 2 n R + a2 = 2402.976 a2 + 2nK = α b = 49.02015 a2 + 2nk -a = x = 109865 n As S ...
... Co. tang . = -1.471630 C = 138 ° 00 ′ its Co. tang . = -1.110606 therefore n = - . 638976 R = 50 , and 2 R = 1000 2 n R = 638.976 a = 42 and a2 = 1764.000 2 n R + a2 = 2402.976 a2 + 2nK = α b = 49.02015 a2 + 2nk -a = x = 109865 n As S ...
Página 307
... Co. tang . —— .07431 angle C is 138 ° 00 ' , Co. tang . = - 1.11061 -- therefore n = — 1.18492 a = 39.20 ; and a2 + 2nR = ab = 58.582 a2 + 2nR -a hence -x is found = 16.36 n hence Cc 24.45 and Bb = 16.40 α EXAMPLE IV . d D E B Q To ...
... Co. tang . —— .07431 angle C is 138 ° 00 ' , Co. tang . = - 1.11061 -- therefore n = — 1.18492 a = 39.20 ; and a2 + 2nR = ab = 58.582 a2 + 2nR -a hence -x is found = 16.36 n hence Cc 24.45 and Bb = 16.40 α EXAMPLE IV . d D E B Q To ...
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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