A Treatise on Plane and Spherical Trigonometry: Including the Construction of the Auxiliary Tables; a Concise Tract on the Conic Sections, and the Principles of Spherical ProjectionH. Orr, 1844 - 228 sider |
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Resultat 1-5 av 41
Side 34
... opposite direc- tion as negative . The same may be said of the sines , tan- gents , & c . Thus the arc AB , its sine ... opposite to CF. The tangent AP and secant CP are also negative ; the former being drawn in a direction opposite to ...
... opposite direc- tion as negative . The same may be said of the sines , tan- gents , & c . Thus the arc AB , its sine ... opposite to CF. The tangent AP and secant CP are also negative ; the former being drawn in a direction opposite to ...
Side 35
... opposite direction , is negative . If we take the arc more than three quadrants , but less than four , as AHDE ; the sine EF is still negative , but the cosine CF and the secant CP are positive ; the secant being produced from the ...
... opposite direction , is negative . If we take the arc more than three quadrants , but less than four , as AHDE ; the sine EF is still negative , but the cosine CF and the secant CP are positive ; the secant being produced from the ...
Side 38
... opposite angles . C Let ABC be a trian- gle ; make AE = BC ; E FH E G G FH B from the centres B and A , with the radii BC and AE , describe the arcs CG and EH ; from C and E , let fall on AB ( produced if necessary ) the perpendiculars ...
... opposite angles . C Let ABC be a trian- gle ; make AE = BC ; E FH E G G FH B from the centres B and A , with the radii BC and AE , describe the arcs CG and EH ; from C and E , let fall on AB ( produced if necessary ) the perpendiculars ...
Side 39
... opposite to those sides , to the tangent of half their difference . G D E A B F Let ABC be the tri- angle ; AC , AB , the sides . From the centre A , with the distance AC , describe the circle DCEF ; meeting AB , produced in D and E ...
... opposite to those sides , to the tangent of half their difference . G D E A B F Let ABC be the tri- angle ; AC , AB , the sides . From the centre A , with the distance AC , describe the circle DCEF ; meeting AB , produced in D and E ...
Side 40
... opposite to those sides , to the tangent of half their difference . B A E = C Let ABC be the trian- gle ; AB the less , and AC the greater side . Draw AD at right angles to AC , and equal to AB ; cut off AE , also = AB ; and join DE and ...
... opposite to those sides , to the tangent of half their difference . B A E = C Let ABC be the trian- gle ; AB the less , and AC the greater side . Draw AD at right angles to AC , and equal to AB ; cut off AE , also = AB ; and join DE and ...
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A Treatise on Plane and Spherical Trigonometry: Including the Construction ... Enoch Lewis Uten tilgangsbegrensning - 1860 |
A Treatise on Plane and Spherical Trigonometry: Including the Construction ... Enoch Lewis Uten tilgangsbegrensning - 1844 |
Vanlige uttrykk og setninger
ABDP angled spherical triangle base bisect c.cos c.sin centre circle Art common section Comp AC cone conical surface consequently construction cosec cosine cotan directrix distance drawn EC² ecliptic ED² ellipse equal equation given angle greater axis Hence hyperbola hypothenuse join latus rectum less circle Let ABC line of measures logarithms meet opposite ordinate original circle parabola parallel perpendicular plane of projection primitive circle projected circle projected pole projecting point Q. E. D. ART Q. E. D. Cor quadrant radius right angled spherical right ascension right line secant semicircle semitangent sides similar triangles sine sphere spherical angle tangent tangent of half touches the circle triangle ABC vertex vertical angle whence wherefore
Populære avsnitt
Side 32 - 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 39 - In the same way it may be proved that a : b : : sin. A : sin. B, and these two proportions may be written a : 6 : c : : sin. A : sin. B : sin. C. THEOREM III. t8. 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. By Theorem II. we have a : b : : sin. A : sin. B.
Side 95 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Side 98 - In a right angled spherical triangle, the rectangle under the radius and the sine of the middle part, is equal to the rectangle under the tangents of the adjacent parts ; or', to the rectangle under the cosines of the opposite parts.
Side 40 - Def. 10. 1.) If then CE is made radius, GE is the tangent of GCE, (Art. 84.) that is, the tangent of half the sum of the angles opposite to AB and AC. If from the greater of the two angles ACB and ABC, there be taken ACD their half sum ; the remaining angle ECB will be their half difference.
Side 36 - The side of a regular hexagon inscribed in a circle is equal to the radius of the circle.
Side 115 - The straight line joining the vertex and the centre of the base is called the axis of the cone.
Side 97 - The cotangent of half the sum of the angles at the base, Is to the tangent of half their difference...
Side 82 - If two angles of a spherical triangle are equal, the sides opposite these angles are equal and the triangle is isosceles. In the spherical triangle ABC, let the angle B equal the angle C. To prove that AC = AB. Proof. Let the A A'B'C
Side 82 - If two triangles have two angles of the one respectively equal to two angles of the other, the third angles are equal.