Elements of Plane and Spherical TrigonometryBaldwin, Cradock, and Joy, 1816 - 244 páginas |
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Página 5
... cotangent of an arc or angle is the tangent of the complement of that arc or angle . The co - versed sine , and co - secant are de- fined similarly . To exemplify these definitions by the annexed dia- gram : let AB be an assumed arc of ...
... cotangent of an arc or angle is the tangent of the complement of that arc or angle . The co - versed sine , and co - secant are de- fined similarly . To exemplify these definitions by the annexed dia- gram : let AB be an assumed arc of ...
Página 6
... cotangent .. ditto cosecant .... ditto . coversed sine ditto .... COS AB , cot AB , cosec AB , coversin AB . Corollaries from the Definitions . 19. ( A ) . Of any arc , less than a quadrant , the arc is less than its corresponding ...
... cotangent .. ditto cosecant .... ditto . coversed sine ditto .... COS AB , cot AB , cosec AB , coversin AB . Corollaries from the Definitions . 19. ( A ) . Of any arc , less than a quadrant , the arc is less than its corresponding ...
Página 7
... cotangent , radius , and cosecant , constitute a third right angled triangle MEC , similar to both the preceding . Hence , when the sine and radius are known , the cosine is determined by Euc . i . 47. The same may be said of the ...
... cotangent , radius , and cosecant , constitute a third right angled triangle MEC , similar to both the preceding . Hence , when the sine and radius are known , the cosine is determined by Euc . i . 47. The same may be said of the ...
Página 15
... cotangent of half the sum of those two arcs , is to the cotangent of half their difference . For , the cosines being the sines of the complements , it follows from the proposition that the sum of the co- sines , is to their difference ...
... cotangent of half the sum of those two arcs , is to the cotangent of half their difference . For , the cosines being the sines of the complements , it follows from the proposition that the sum of the co- sines , is to their difference ...
Página 53
... cotangent of half the given angle , the sum will be the log . tangent of half the difference of the other two angles of the plane triangle . 38. Let us next return to the equation ( 1 ) in art . 11 of this chapter ; namely , a = b cos c ...
... cotangent of half the given angle , the sum will be the log . tangent of half the difference of the other two angles of the plane triangle . 38. Let us next return to the equation ( 1 ) in art . 11 of this chapter ; namely , a = b cos c ...
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Términos y frases comunes
altitude angled spherical triangle axis azimuth base becomes bisect centre chap chord circle circle of latitude computation consequently cos² cosec cosine cotangent declination deduced determine dial diameter difference distance draw earth ecliptic equa equal equation Example find the rest formulæ given side h cos h half Hence horizon hour angle hypoth hypothenuse intersecting latitude logarithmic longitude measured meridian oblique opposite angle parallel perpendicular plane angles plane triangle pole problem prop quadrant radius rectangle right angled spherical right angled triangle right ascension right line secant sin a sin sin² sine solid angle sphere spherical excess spherical trigonometry star substyle sun's supposed surface tan² tangent theorem three angles three sides tion triangle ABC values versed sine versin vertical angle whence yards zenith
Pasajes populares
Página 4 - 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.
Página 248 - SCIENTIFIC DIALOGUES ; intended for the Instruction and Entertainment of Young People ; in which the first principles of Natural and Experimental Philosophy are fully explained, by the Rev.
Página 225 - ... third of the excess of the sum of its three angles above two right angles...
Página 19 - In any plane triangle, as twice the rectangle under any two sides is to the difference of the sum of the squares of those two sides and the square of the base, so is the radius to the cosine of the angle contained by the two sides.
Página 30 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Página 249 - OSTELL'S NEW GENERAL ATLAS; containing distinct Maps of all the principal States and Kingdoms throughout the World...
Página 34 - Call any one of the sides radius, and write upon it the word radius ; observe whether the other sides become sines, tangents, or secants, and write those words upon them accordingly. Call the word written upon each side the name of each side ; then say, As the name of the given side, Is to the given side ; So is the name of the required side, To the required side.
Página 69 - Being on a horizontal plane, and wanting to ascertain the height of a tower, standing on the top of an inaccessible hill, there were measured, the angle of elevation of the top of the hill 40°, and of the top of the tower 51° ; then measuring in a direct line 180 feet farther from the hill, the angle of elevation of the top of the tower was 33° 45' ; required the height of the tower.
Página 18 - 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.
Página 83 - 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...