A Treatise on Elementary Geometry: With Appendices Containing a Collection of Exercises for Students and an Introduction to Modern Geometry |
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Page 6
... EQUATIONS AND OF NUMERICAL EQUA- TIONS OF THE SECOND AND THIRD DEGREES . CHAPTER XI . 75 85 ............ 101 DIFFERENCES AND DIFFERENTIALS OF THE TRIGONOMETRIC FUNCTIONS ... CHAPTER XII . DIFFERENCES AND DIFFERENTIALS OF PLANE TRIANGLES ...
... EQUATIONS AND OF NUMERICAL EQUA- TIONS OF THE SECOND AND THIRD DEGREES . CHAPTER XI . 75 85 ............ 101 DIFFERENCES AND DIFFERENTIALS OF THE TRIGONOMETRIC FUNCTIONS ... CHAPTER XII . DIFFERENCES AND DIFFERENTIALS OF PLANE TRIANGLES ...
Page 7
... Equations ...... 214 227 CHAPTER V. AREA OF A SPHERICAL TRIANGLE .... 229 CHAPTER VI . DIFFERENCES AND DIFFERENTIALS OF SPHERICAL TRIANGLES .... 232 ........................ ................. CHAPTER VII . APPROXIMATE SOLUTION OF ...
... Equations ...... 214 227 CHAPTER V. AREA OF A SPHERICAL TRIANGLE .... 229 CHAPTER VI . DIFFERENCES AND DIFFERENTIALS OF SPHERICAL TRIANGLES .... 232 ........................ ................. CHAPTER VII . APPROXIMATE SOLUTION OF ...
Page 15
... equations , that the sine and cosecant of the same angle are reciprocals ; and from the other equations , also , that the cosine and secant , the tangent and cotangent are reciprocals . That is , sin A = 1 cosec A cosec A = 1 cos A = 1 ...
... equations , that the sine and cosecant of the same angle are reciprocals ; and from the other equations , also , that the cosine and secant , the tangent and cotangent are reciprocals . That is , sin A = 1 cosec A cosec A = 1 cos A = 1 ...
Page 19
... equations are easily demonstrated by combining ( 13 ) , ( 14 ) , ( 15 ) , ( 16 ) , ( 17 ) , and employing the property of the reciprocals ( 2 ) . They are of frequent use . 1 sin x = tan x cos x = cosec x tan x sec x COS X cot x 1 cot x ...
... equations are easily demonstrated by combining ( 13 ) , ( 14 ) , ( 15 ) , ( 16 ) , ( 17 ) , and employing the property of the reciprocals ( 2 ) . They are of frequent use . 1 sin x = tan x cos x = cosec x tan x sec x COS X cot x 1 cot x ...
Page 23
... equations become by means of the preceding values sin 180 ° 1x0 + 0x1 = 0 = cos 180 ° = 0x0-1x1 = -1 whence by ( 9 ) and ( 2 ) ( 46 ) ( 47 ) 99 0 tan 180 ° = = cot 180 ° = 1/0 1 sec 180 ° = 1 = 1 cosec 180 ° = 0 = ∞ ( 48 ) ( 49 ) 35 ...
... equations become by means of the preceding values sin 180 ° 1x0 + 0x1 = 0 = cos 180 ° = 0x0-1x1 = -1 whence by ( 9 ) and ( 2 ) ( 46 ) ( 47 ) 99 0 tan 180 ° = = cot 180 ° = 1/0 1 sec 180 ° = 1 = 1 cosec 180 ° = 0 = ∞ ( 48 ) ( 49 ) 35 ...
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A Treatise on Elementary Geometry: With Appendices Containing a Collection ... William Chauvenet No preview available - 2016 |
A Treatise on Elementary Geometry: With Appendices Containing a Collection ... William Chauvenet No preview available - 2015 |
Common terms and phrases
Acos applied B+AB becomes C+AC c₁ coefficients computation constant cos b cos cos² cos³ cosb cosc cosec cosm Csin deduce denote differential employed equal equations EXAMPLE expressed factors finite differences formulæ gives imaginary increments inscribed circle integer less than 180 log cot log sin logarithms multiple angle Napier's negative obtain perp perpendicular plane triangle polar triangle positive preceding article quadrant radius reduced right angle right triangles roots second member simple angle sin b sin sin c cos sin x sin² sin³ sine sine and cosine solution solve the triangle spherical triangle SPHERICAL TRIGONOMETRY Substituting the values tables tan-¹ tan³ tana tangent theorem Trig trigonometric functions unity whence zero Δα
Popular passages
Page 150 - In a spherical triangle, the sines of the sides are proportional to the sines of the opposite angles. Let ABC, Fig. 1, be a spherical triangle, 0 the center of the sphere. The angles...
Page 152 - ... cos a = cos b cos с + sin b sin с cos A ; (2) cos b = cos a cos с + sin a sin с cos в ; ^ A. (3) cos с = cos a cos b + sin a sin b cos C.
Page 169 - I. The sine of the middle part is equal to the product of the tangents of the adjacent parts.
Page 58 - THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE. Thus, the sum of AB and AC, (Fig. 25.) is to their difference ; as the tangent of half the sum of the angles ACB and ABC, to the tangent of half their difference.
Page 229 - This problem is solved in geometry, where it is proved that the surface of a spherical triangle is measured by the excess of the sum of its three angles over two right angles...
Page 153 - A cos 6 = cos a cos c + sin a sin c cos B cos c = cos a cos 6 + sin a sin 6 cos C Law of Cosines for Angles cos A = — cos B...
Page 64 - Art. 117, and state the proportions thus : the sine of the angle opposite the given side is to the sine of the angle opposite the required side, as the given side is to the required side.
Page 191 - It is easily seen, also, that all the formulae above given for this case might have been obtained by these considerations. 84. CASE III. G-iven two sides and an angle opposite one of them ; or a, b, and A. Fig, 9. First Solution, in which each required part is deduced directly from fundamental formula independently of the other two parts. To find c. We have, by (4...
Page 151 - ... might therefore be considered as general, without requiring a special examination of the various positions of the lines of the diagram. 5. In a spherical triangle^ the cosine of any side is equal to the product of the cosines of the other two sides, plus the continued product of the sines of those sides and the cosine of the included angle.
Page 65 - Art. 117, and state the proportion thus : the side opposite the given angle is to the side opposite the required angle as the sine of the given angle is to the sine of the required angle.