Practical Surveying: A Text-book for Students Preparing for Examinations Or for Survey-work in the ColoniesC. Lockwood and Son, 1889 - 272 Seiten |
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Seite vi
... Cosec A - Cos A in Terms of Sec A- Complemental Angles - The Sine , & c . , and its Complement - Supple- mental Angles - Use of + and Signs - Positive and Negative Condition of each Quadrant - Radius Unity - Basis of Formulæ- Sines ...
... Cosec A - Cos A in Terms of Sec A- Complemental Angles - The Sine , & c . , and its Complement - Supple- mental Angles - Use of + and Signs - Positive and Negative Condition of each Quadrant - Radius Unity - Basis of Formulæ- Sines ...
Seite 92
... Cosec A The cosecant do . Vers A = The versed sine do . Covers A = The coversed sine do . Cho A = The chord do . Relation of Hypotenuse to the other Sides of Right - angled Triangle . Perhaps it may be better to refer to the 47th ...
... Cosec A The cosecant do . Vers A = The versed sine do . Covers A = The coversed sine do . Cho A = The chord do . Relation of Hypotenuse to the other Sides of Right - angled Triangle . Perhaps it may be better to refer to the 47th ...
Seite 94
... Cosec A BASE AC PERP BC HYP BASE AB - AC Vers A HYP A B. HYP PERP AB - BO BC Covers A HYP A B. BC = ABCOS B ; AC = A B sine B ; AB = BC sec в . B = complement of A = 90 A + B + C = 180 ° . - A. I may explain , by reference to Fig . 148 ...
... Cosec A BASE AC PERP BC HYP BASE AB - AC Vers A HYP A B. HYP PERP AB - BO BC Covers A HYP A B. BC = ABCOS B ; AC = A B sine B ; AB = BC sec в . B = complement of A = 90 A + B + C = 180 ° . - A. I may explain , by reference to Fig . 148 ...
Seite 95
... Cosec A = AC BC A little reflection will serve to impress upon the mind the equality of these ratios under the two circumstances I have illus- trated . Cotangent of Greater or Less Angles . - Here the cotangent and cosecant in Fig . 149 ...
... Cosec A = AC BC A little reflection will serve to impress upon the mind the equality of these ratios under the two circumstances I have illus- trated . Cotangent of Greater or Less Angles . - Here the cotangent and cosecant in Fig . 149 ...
Seite 96
... cosec A = 1 + cot 2A . Since a b b a = 1 , tan a cot A = 1 . ( 2 ) . 2 ; ( ) ; or or revers- .. ( 3 ) . ( 4 ) . a a ... cosec A = -'... cosec A .... ( 10 ) . a C sin A Vers A = 1 cos A , and covers A = 1 sin A. ... ( 11 ) . TERMS ...
... cosec A = 1 + cot 2A . Since a b b a = 1 , tan a cot A = 1 . ( 2 ) . 2 ; ( ) ; or or revers- .. ( 3 ) . ( 4 ) . a a ... cosec A = -'... cosec A .... ( 10 ) . a C sin A Vers A = 1 cos A , and covers A = 1 sin A. ... ( 11 ) . TERMS ...
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accuracy accurately adjusted arrow axis back and fore back-sight beam compasses bench-mark boundaries centre chain chain-line chords clamped clinometer colour commencement compass consequently Cosec cosine cross-staff cross-wires curve direction distance ditch divided DUMPY LEVEL end of line equal feet fence field-book figures fixed fore sight ground hedge hypotenuse illustration inch instrument intermediate intersection length line A B line of collimation logarithm mark means measured necessary observed offsets parallel plate pencil perpendicular plane plot plumb-bob position post-and-rail fence quadrant radius ratio reading reference represent right angles scale screw secant seen sextant shown side sine sketch square staff station straight line survey surveyor take the angle tangent tangential angle telescope theodolite tion traverse triangle trigonometry upper vernier whilst Wimbledon Park wires zero دو دو
Beliebte Passagen
Seite 86 - If two triangles have two sides of the one equal to two sides of the...
Seite 89 - IF a straight line fall upon two parallel straight lines, it makes the alternate angles equal to one another; and the exterior angle equal to the interior and opposite upon...
Seite 85 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.
Seite 61 - When you have proved that the three angles of every triangle are equal to two right angles...
Seite 85 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another : 16.
Seite 92 - In any right-angled triangle, the square which is described on the side subtending the right angle is equal to the sum of the squares described on the sides which contain the right angle.
Seite 116 - In any plane triangle, as the sum of the sides about the vertical angle is to their difference, so is the tangent of half the sum of the angles at the base to the tangent of half their difference.
Seite 85 - A plane rectilineal angle is the inclination of two straight lines to one another, which meet together, but are not in the same straight line.
Seite 127 - As the sum of the two given sides Is to their difference, So is the tangent of half the sum of their opposite angles To the tangent of half the difference of the same angles.
Seite 85 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.