A treatise on navigation, and nautical astronomyBaldwin, Cradock, and Joy, 1824 - 551 Seiten |
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Ergebnisse 1-5 von 47
Seite 110
... horizontal line A B , and with the aid of the line of chords , make the angle A equal to about 3840 , on AC from a scale of equal parts lay off 840'4 , and from Clet fall on A B the perpendicular B C , then A B and B C measured on the ...
... horizontal line A B , and with the aid of the line of chords , make the angle A equal to about 3840 , on AC from a scale of equal parts lay off 840'4 , and from Clet fall on A B the perpendicular B C , then A B and B C measured on the ...
Seite 111
... horizontal line A B , and make it of the proposed length from any convenient scale of equal parts . Make the angle A of the given magnitude , and draw B C perpendicular to A B , meeting A C in C. Then A C , measured on the scale of ...
... horizontal line A B , and make it of the proposed length from any convenient scale of equal parts . Make the angle A of the given magnitude , and draw B C perpendicular to A B , meeting A C in C. Then A C , measured on the scale of ...
Seite 123
... horizontal angles are determined by the compass ; but the varying effect of surrounding bodies on the needle , even in situations little removed from each other , and the general construction of the instrument itself , render it unfit ...
... horizontal angles are determined by the compass ; but the varying effect of surrounding bodies on the needle , even in situations little removed from each other , and the general construction of the instrument itself , render it unfit ...
Seite 128
... horizontal angle at this station between the spire and another station was 93 ° 4 ′ 20 ′′ ; the horizontal angle at the latter station between the spire and the first station was 54 ° 28.36 " , and the distance between the two stations ...
... horizontal angle at this station between the spire and another station was 93 ° 4 ′ 20 ′′ ; the horizontal angle at the latter station between the spire and the first station was 54 ° 28.36 " , and the distance between the two stations ...
Seite 129
... horizontal plane , an angle of 57 ° 21 ' , what is the distance of the object from the bottom of the tower ? Answer , 233.3 feet . 4. From the top of a tower , whose height was 138 feet , I took the angles of depression of two objects ...
... horizontal plane , an angle of 57 ° 21 ' , what is the distance of the object from the bottom of the tower ? Answer , 233.3 feet . 4. From the top of a tower , whose height was 138 feet , I took the angles of depression of two objects ...
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Häufige Begriffe und Wortgruppen
angled spherical triangle Answer apparent altitude Atlantic Ocean bisected Cape celestial object centre chronometer circle column compass computed correction Cosec Cosine Cotang course and distance declination diff lat diff long Difference of Latitude difference of longitude Dist equal equator EXAMPLES FOR EXERCISE Given A B greater Greenwich Hence horizontal parallax Indian Archipelago Indian Ocean Island Latitude and Departure latitude and longitude logarithm longitude Lunar Distance meridian distance miles moon moon's Nautical Almanac noon observed opposite Pacific Ocean parallax parallel parallel sailing parallelogram perpendicular plane sailing polar distance pole quadrant radius rectangle rhumb line right angled spherical right ascension Secant semidiameter sides squares of A C subtract Suvers Suversed Sines Table Tang tangent Theo THEOREM triangle A B C true altitude true distance Vers
Beliebte Passagen
Seite 18 - LET it be granted that a straight line may be drawn from any one point to any other point.
Seite 17 - When equals are taken from unequals, the remainders are unequal. 6. Things which are double of the same thing, or equal things, are equal to each other.
Seite 86 - III.), is a circle. If the plane pass through the centre, then, as every point in the surface of the sphere is equidistant from its centre, the section is a plane figure, every point of whose periphery is equidistant from a certain point within it, and the figure is therefore a circle. But if the plane do not pass through...
Seite 26 - Therefore all the interior angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Seite 114 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Seite 63 - If from a point without a circle two straight lines be drawn, one of which...
Seite 147 - Mathematical o>jgraphy.) the arc of the equator, intercepted between the first meridian...
Seite 64 - If from any point without a circle straight lines be drawn touching it, the angle contained by the tangents is double the angle contained by the straight line joining the points of contact and the diameter drawn through one of them.
Seite 139 - Given the vertical angle, the difference of the two sides containing it, and the difference of the segments of the base made by a perpendicular from the vertex ; construct the triangle.
Seite 86 - ... half a right angle, as the tangent of half the sum of the angles, at the base of the triangle to the tangent of half their difference.