Tables of Logarithms of Numbers and of Sines and Tangents for Every Ten Seconds of the Quadrant: With Other Useful TablesHarper & brothers, 1859 - 150 páginas |
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Página 93
... object observed . A plumb line , CE , is suspended from the center of the quadrant , and in- dicates when the radius ... object is seen in the middle of the field of view . The center of the field is in- dicated by two wires placed in ...
... object observed . A plumb line , CE , is suspended from the center of the quadrant , and in- dicates when the radius ... object is seen in the middle of the field of view . The center of the field is in- dicated by two wires placed in ...
Página 96
... object with precision , two lines called wires are fixed at right angles to each other in the focus of the telescope ... objects to be observed , moving it until the cross - 96 TRIGONOMETRY .
... object with precision , two lines called wires are fixed at right angles to each other in the focus of the telescope ... objects to be observed , moving it until the cross - 96 TRIGONOMETRY .
Página 97
... object , as was done by the first . Again , read off the vernier ; the difference be- tween this and the former reading will be the angle required . The magnetic bearing of an object is determined by simply reading the angle pointed out ...
... object , as was done by the first . Again , read off the vernier ; the difference be- tween this and the former reading will be the angle required . The magnetic bearing of an object is determined by simply reading the angle pointed out ...
Página 98
... object whose height is known . Measure the angle of elevation , and we shall have given the angles and perpendicular of a right - angled triangle to find the base ( Art . 46 ) . C Ex . 1. The angle of elevation of the top of a tower ...
... object whose height is known . Measure the angle of elevation , and we shall have given the angles and perpendicular of a right - angled triangle to find the base ( Art . 46 ) . C Ex . 1. The angle of elevation of the top of a tower ...
Página 99
... object standing on an inclined plane . Measure the distance from the object to any convenient sta- tion , and observe the angles which the base - line makes with lines drawn from its two ends to the top of the object . If we measure the ...
... object standing on an inclined plane . Measure the distance from the object to any convenient sta- tion , and observe the angles which the base - line makes with lines drawn from its two ends to the top of the object . If we measure the ...
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Términos y frases comunes
9 I I altitude angle of elevation arithm base chains circle Co-sine Co-tangent complement computed correction cosecant course and distance decimal diameter diff difference of latitude difference of longitude Dist divided equal equator fifth figure find the angles find the area find the Logarithm frustum given number given the angle height Hence horizontal plane hypothenuse inches latitude and departure length LO LO LO logarithmic sine measured meridian middle latitude miles minutes Multiply natural number nautical miles parallel parallel sailing perpendicular places plane sailing Prob Prop proportional quadrant radius Required the logarithmic right-angled spherical triangle right-angled triangle Sandy Hook secant ship sails side AC spherical triangle ABC SPHERICAL TRIGONOMETRY station subtract surface tabular number tang Tangent telescope theodolite Theorem vernier vertical Vulgar Fraction wyll yards zoids ΙΙ ΙΟ
Pasajes populares
Página 20 - The circumference of every circle is supposed to be divided into 360 equal parts, • called degrees, each degree into 60 minutes, and each minute into 60 seconds, etc.
Página 163 - In any spherical triangle, the sines of the sides are proportional to the sines of the opposite angles. In the case of right-angled spherical triangles, this proposition has already been demonstrated.
Página 69 - FIND the area of the sector having the same arc with the segment, by the last problem. Find also the area of the triangle, formed by the chord of the segment and the two radii of the sector.
Página 54 - 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.
Página 69 - TO THE NUMBER OF DEGREES IN THE ARC ; So IS THE AREA OF THE CIRCLE, TO THE AREA OF THE SECTOR.
Página 73 - To find the solidity of a pyramid. RULE. Multiply the area of the base by one third of the altitude.
Página vi - The characteristic of the logarithm of ANY NUMBER GREATER THAN UNITY, is one less than the number of integral figures in the given number.
Página 184 - If a heavy sphere, whose diameter is 4 inches, be let fall into a conical glass, full of water, whose diameter is 5, and altitude 6 inches ; it is required to determine how much water will run over ? AHS.