The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtE. Duyckinck, 1811 - 508 σελίδες |
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Σελίδα 41
... secant of the are HB . fig . 8 . 24. What an arc wants of a quadrant is called the complement thereot : Thus DH is ... secant of the com- plement of any arc , is called the co - sine , co tan- gent , or co - secant of the arc itself ...
... secant of the are HB . fig . 8 . 24. What an arc wants of a quadrant is called the complement thereot : Thus DH is ... secant of the com- plement of any arc , is called the co - sine , co tan- gent , or co - secant of the arc itself ...
Σελίδα 43
... secant of the arc itsek z 2 sine , DI the tangent , and C 1 arc DH : or they are the co - secant of the arc HB . fig .. 27. The sine of the sup • the same with the sine o = ing them according to demais self - same line ; thus H1 fis ar ...
... secant of the arc itsek z 2 sine , DI the tangent , and C 1 arc DH : or they are the co - secant of the arc HB . fig .. 27. The sine of the sup • the same with the sine o = ing them according to demais self - same line ; thus H1 fis ar ...
Σελίδα 62
... secant , and CI its co - secant . Fig . 8 . 1. The co - sine of an arc is to the sine , as the ra- dius is to the tangent . 2. The radius is to the tangent of an arc 62 GEOMETRICAL.
... secant , and CI its co - secant . Fig . 8 . 1. The co - sine of an arc is to the sine , as the ra- dius is to the tangent . 2. The radius is to the tangent of an arc 62 GEOMETRICAL.
Σελίδα 63
... secant . 7. The sine of an arc is to the radius , as the tan- gent 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 the radius , as the tan- gent 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 ...
Σελίδα 85
... secant of 28 ° 30 ′ was required ? Make the given radius , two inches , a transverse distance to 0 and 0 , at the ... secant of any degrees ; to find the length of the radius to that sine , tangent , or secant . Make the given length a ...
... secant of 28 ° 30 ′ was required ? Make the given radius , two inches , a transverse distance to 0 and 0 , at the ... secant of any degrees ; to find the length of the radius to that sine , tangent , or secant . Make the given length a ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
acres altitude Answer arch azimuth base bearing blank line centre chains and links chord circle circumferentor Co-sec Co-tang column compasses contained decimal difference distance line divided divisions draw east Ecliptic edge feet field-book figures fore four-pole chains geom given number half the sum Horizon glass hypothenuse inches instrument Lat Dep Lat latitude length logarithm measure meridian distance multiplied natural co-sine natural sine needle Nonius number of degrees object observed off-sets opposite parallel parallelogram pegs perches perpendicular plane pole pole star Portmarnock PROB protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect Sextant side sights square station stationary distance subtract Sun's survey taken Tang tangent theo theodolite trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence
Δημοφιλή αποσπάσματα
Σελίδα 38 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Σελίδα 25 - 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, &c.
Σελίδα 197 - RULE. From half the sum of the three sides subtract each side severally.
Σελίδα 106 - 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.
Σελίδα 27 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc. Thus BA is the versed sine of the arc AG.