An Introduction to the Theory and Practice of Plain and Spherical Trigonometry: And the Stereographic Projection of the Sphere : Including the Theory of Navigation ...Longman, Rees, Orme, Brown, and Green, 1826 - 442 sider |
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Resultat 1-5 av 74
Side 61
... pole Gunter's chain ; but common tape of 50 or 100 feet in length is often preferred both for accuracy and expedition : especially if it be kept dry , and the ground be tolerably level . ( W ) The use of instruments must be acquired ...
... pole Gunter's chain ; but common tape of 50 or 100 feet in length is often preferred both for accuracy and expedition : especially if it be kept dry , and the ground be tolerably level . ( W ) The use of instruments must be acquired ...
Side 62
... taking angles , are given in Adams ' Geometrical and Graphical Essay , edited and published by Mr. Wm , Jones , mathematical instrument maker in Holborn , London . D to E , and set up a pole or 62 BOOK II . THE MENSURATION OF.
... taking angles , are given in Adams ' Geometrical and Graphical Essay , edited and published by Mr. Wm , Jones , mathematical instrument maker in Holborn , London . D to E , and set up a pole or 62 BOOK II . THE MENSURATION OF.
Side 63
... pole or staff at H perpendicular to EC . Measure the distances DB , DE , and also EG in the direction EH till G , B ... poles , from D , I measured DB at right angles to ED = 43 poles , and coming to E I measured EG in the direction EH ...
... pole or staff at H perpendicular to EC . Measure the distances DB , DE , and also EG in the direction EH till G , B ... poles , from D , I measured DB at right angles to ED = 43 poles , and coming to E I measured EG in the direction EH ...
Side 64
... pole at D , in the direction of the face BC of the bas- tion ( out of the reach of musket shot ) . With a cross - staff at D direct a person to set up another pole at F perpendicular to DC . Measure DF 375 paces or 9373 feet , make FK ...
... pole at D , in the direction of the face BC of the bas- tion ( out of the reach of musket shot ) . With a cross - staff at D direct a person to set up another pole at F perpendicular to DC . Measure DF 375 paces or 9373 feet , make FK ...
Side 65
... pole at c in a right line with AB , at c the angle ACD was 570.0 ' ; I then measured CD = 784-8 yards , and at D the angles CDA and ADB were 14 ° .0 ′ and 41 ° .30 ' . Required the several distances above mentioned . Answer . AD 696 1 ...
... pole at c in a right line with AB , at c the angle ACD was 570.0 ' ; I then measured CD = 784-8 yards , and at D the angles CDA and ADB were 14 ° .0 ′ and 41 ° .30 ' . Required the several distances above mentioned . Answer . AD 696 1 ...
Vanlige uttrykk og setninger
acute Aldebaran angle CAB Answer apparent altitude azimuth base centre circle co-tangent compasses complement CONSTRUCTION cosec cosine degrees diff difference of latitude difference of longitude draw ecliptic equator Euclid find the angle formulæ given side greater Greenwich Hence horizon horizontal parallax hypoth hypothenuse less line of numbers line of sines log sine measured meridian miles moon's N.sine N.cos Naut Nautical Almanac noon North oblique observed obtuse opposite angle parallax parallel perpendicular plane sailing Plate pole prime vertical PROPOSITION quadrant Rad x sine rad2 radius rhumb line right angles right ascension right-angled spherical triangle RULE scale of chords scale of equal SCHOLIUM secant side AC sine A sine sine BC Sine Co-sine sphere spherical angle spherical triangle ABC star star's subtract sun's declination supplement tang tangent of half three angles three sides Trigonometry true altitude versed sine
Populære avsnitt
Side 21 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
Side 2 - And if the given number be a proper vulgar fraction ; subtract the logarithm of the denominator from the logarithm of the numerator, and the remainder will be the logarithm sought ; which, being that of a decimal fraction, must always have a negative index.
Side 28 - The CO-SINE of an arc is the sine of the complement of that arc as L.
Side 107 - 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.
Side 31 - An angle at the circumference of a circle is measured by half the arc that subtends it. Let BAC be an angle at the circumference : it has for its measure half the arc "BC, which subtends it.
Side 136 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Side 258 - The HORIZON is a great circle which separates the visible half of the heavens from the invisible ; the earth being considered as a point in the centre of the sphere of the fixed stars.
Side 28 - The SECANT of an arc, is a straight line drawn from the center, through one end of the arc, and extended to the tangent which is drawn from the other end.
Side 27 - The sine, or right sine, of an arc, is the line drawn from one extremity of the arc, perpendicular to the diameter passing through the other extremity. Thus, BF is the sine of the arc AB, or of the arc BDE.