Mathematics: Compiled from the Best Authors and Intended to be the Text-book of the Course of Private Lectures on These Sciences in the University at Cambridge, Volumen2Printed at the University Press, by WilliamHilliard, 1801 |
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Página 9
... centre is the angular point . A right angle is therefore an angle of 90 degrees ; and the sum of the three angles of every triangle , or two right angles , is equal to 180 ° . Wherefore , in a right - angled triangle , one acute angle ...
... centre is the angular point . A right angle is therefore an angle of 90 degrees ; and the sum of the three angles of every triangle , or two right angles , is equal to 180 ° . Wherefore , in a right - angled triangle , one acute angle ...
Página 10
... centre through the other end of the arc . So AG or DK is the tangent of AB , or of BCD . The secant of an arc is the line , drawn from the centre through the end of the arc , and terminated by the tan- gent . So FG or FK is the secant ...
... centre through the other end of the arc . So AG or DK is the tangent of AB , or of BCD . The secant of an arc is the line , drawn from the centre through the end of the arc , and terminated by the tan- gent . So FG or FK is the secant ...
Página 14
... angle A37 ° 20 ' . 3. With the centre B , and radius 232 , taken from the same scale of equal parts , cross AC in C. 4. Draw BC , and the triangle is constructed . Then Then the angles B and C , measured by the 34 PLANE TRIGONOMETRY .
... angle A37 ° 20 ' . 3. With the centre B , and radius 232 , taken from the same scale of equal parts , cross AC in C. 4. Draw BC , and the triangle is constructed . Then Then the angles B and C , measured by the 34 PLANE TRIGONOMETRY .
Página 21
... centre , and radius AB , describe a circle cutting the other two sides in E and F ; produce CB to the circle at G , and let fall the perpendicular BD . Then is GB = BF AB , and ( by 3 III . Eucl . ) AD = Ꭿ B DE , and consequently EC ...
... centre , and radius AB , describe a circle cutting the other two sides in E and F ; produce CB to the circle at G , and let fall the perpendicular BD . Then is GB = BF AB , and ( by 3 III . Eucl . ) AD = Ꭿ B DE , and consequently EC ...
Página 27
... centre A and radius AB , describe an arc BF : then it is evident , that the other leg BC represents the tangent , and the hypot- F enuse AC the secant of the angle A or arc BF . P D E In like manner , if the leg BC be made radius , then ...
... centre A and radius AB , describe an arc BF : then it is evident , that the other leg BC represents the tangent , and the hypot- F enuse AC the secant of the angle A or arc BF . P D E In like manner , if the leg BC be made radius , then ...
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Términos y frases comunes
abscisses ADBA altitude angle answer axes axis azimuth base breadth bung diameter cask centre chord circumference cone conjugate cosine course curve declination departure dial diff difference of latitude difference of longitude distance divided draw drawn ecliptic ellipse equal equinoctial EXAMPLES feet figure find the area find the solidity frustum given head diameter height Hence horizon hour angle hour lines hyperbola hypotenuse intersection latit measure meridian middle latitude miles multiply the sum NOTE oblique circle opposite ordinate parabola parallel of latitude parallel sailing parallelogram perpendicular plane sailing pole primitive PROBLEM PROBLEM projection proportion quadrant radius rectangle Required the area Required the content right ascension right line RULE secant segment side sphere spherical triangle spindle square star station stile subtract sun's tance tang tangent THEOREM transverse trapezium triangle ABC ullage wine gallons yards
Pasajes populares
Página 21 - As the base or sum of the segments Is to the sum of the other two sides, So is the difference of those sides To the difference of the segments of the base.
Página 17 - To find the other side: — 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 their difference...
Página 83 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Página 328 - The conjugate to any diameter is the line drawn through the centre, and parallel to the tangent of the curve at the vertex of the diameter. So...
Página 28 - But if the hypothenuse be made radius -, then each leg "will represent the sine of its opposite angle ; namely, the leg AB the sine of the arc AE or angle c, and the leg BC the sine of the arc CD or angle A.
Página 83 - The axis of a solid is a line drawn from the middle of one end to the middle of the opposite end ; as between the opposite ends of a prism.
Página 83 - The sphere may be conceived to be formed by the revolution of a semicircle about its diameter, which remains fixed.
Página 130 - Between these, in a right line, stands an ancient statue, the head whereof is 97 feet from the summit of the higher, and 86 feet from the top of the lower column, and the distance between the...
Página 205 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Página 38 - Multiply the sum of the two parallel sides by the perpendicular distance between them, and half the product will be the area.