A treatise on navigation, and nautical astronomyBaldwin, Cradock, and Joy, 1824 - 551 sider |
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Side ii
... object of mathematical instruction to superinduce . The principal and most useful trigonometrical for- mulæ are written out in words , in the form of practical rules ; and the whole of the work has been so arranged that the theoretical ...
... object of mathematical instruction to superinduce . The principal and most useful trigonometrical for- mulæ are written out in words , in the form of practical rules ; and the whole of the work has been so arranged that the theoretical ...
Side v
... object . The examples which require numerical computation are chiefly new ; and in making such a multiplicity of calculations , it is very probable that a wrong figure may have sometimes passed unob- served , though it is believed that ...
... object . The examples which require numerical computation are chiefly new ; and in making such a multiplicity of calculations , it is very probable that a wrong figure may have sometimes passed unob- served , though it is believed that ...
Side 11
... object is rather to point out the prin- cipal properties of logarithms , and to explain their practical uses , than to give a view of the many refined artifices which have been employed in computing them , we shall merely shew by one ...
... object is rather to point out the prin- cipal properties of logarithms , and to explain their practical uses , than to give a view of the many refined artifices which have been employed in computing them , we shall merely shew by one ...
Side 123
... object C , ( see first figure , p . 116 ) I measured a base A B of 486 yards . At A , I found the angle C A B subtended by the object , and the other end of the line , to be 88 ° 12 ' ; and at B the angle CBA was observed to be 54 ° 48 ...
... object C , ( see first figure , p . 116 ) I measured a base A B of 486 yards . At A , I found the angle C A B subtended by the object , and the other end of the line , to be 88 ° 12 ' ; and at B the angle CBA was observed to be 54 ° 48 ...
Side 129
... object on the 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 ...
... object on the 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 ...
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A Treatise on Navigation and Nautical Astronomy ... Fourth edition, etc Edward Riddle Uten tilgangsbegrensning - 1842 |
Vanlige uttrykk og setninger
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
Populære avsnitt
Side 18 - LET it be granted that a straight line may be drawn from any one point to any other point.
Side 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.
Side 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...
Side 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.
Side 114 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Side 63 - If from a point without a circle two straight lines be drawn, one of which...
Side 147 - Mathematical o>jgraphy.) the arc of the equator, intercepted between the first meridian...
Side 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.
Side 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.
Side 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.