An elementary course of practical mathematics, Parte31851 |
Dentro del libro
Resultados 1-5 de 7
Página 242
... 2. What are the natural numbers of which the follow- Or the latter part of the preceding line , when any of the figures in that line are marked with a hyphen above . ing are the logarithms , 0-860098 and 3.181272 ? ( 242 10 ON THE USE.
... 2. What are the natural numbers of which the follow- Or the latter part of the preceding line , when any of the figures in that line are marked with a hyphen above . ing are the logarithms , 0-860098 and 3.181272 ? ( 242 10 ON THE USE.
Página 257
... marked with the corres- ponding natural numbers . * Thus , the figure 6 is marked at the termination of the length of the logarithm of 6 . All the lengths commence at one point , which is marked with a unit , since the logarithm of 1 is ...
... marked with the corres- ponding natural numbers . * Thus , the figure 6 is marked at the termination of the length of the logarithm of 6 . All the lengths commence at one point , which is marked with a unit , since the logarithm of 1 is ...
Página 262
... marked by a small circle over them ; minutes by one accent ; seconds , by two accents , & c . : thus 6 ° 4 ' 14 " 37 " " means 6 degrees , 4 minutes , 14 seconds , 37 thirds . * 6. An arc or angle is thus measured by the number of ...
... marked by a small circle over them ; minutes by one accent ; seconds , by two accents , & c . : thus 6 ° 4 ' 14 " 37 " " means 6 degrees , 4 minutes , 14 seconds , 37 thirds . * 6. An arc or angle is thus measured by the number of ...
Página 279
... marked in the following diagram . PROBLEM I. In any Triangle , having given two of the Angles , to find the third Angle . RULE . Subtract the sum of the two given angles from 180 degrees . FORMULE . a A = 180 ° - ( B + C ) . B = 180 ...
... marked in the following diagram . PROBLEM I. In any Triangle , having given two of the Angles , to find the third Angle . RULE . Subtract the sum of the two given angles from 180 degrees . FORMULE . a A = 180 ° - ( B + C ) . B = 180 ...
Página 298
... marked to be 26 feet above the base , the height of the quadrant being 5 feet . What is the height of the wall ? Ans . 98.01 + feet . 19. From the brow of a steep headland a ship was ob- served in the roads beneath . The angle of ...
... marked to be 26 feet above the base , the height of the quadrant being 5 feet . What is the height of the wall ? Ans . 98.01 + feet . 19. From the brow of a steep headland a ship was ob- served in the roads beneath . The angle of ...
Términos y frases comunes
angle opposite angles of elevation angular elevation arc BC arithmetical series artificial horizon chains CHAPTER VII ciphers circle column compasses compound interest Compute Cosec Cosine Cotang cube roots decimal point degrees and minutes diagram diameter Divide divisor EDINBURGH EXAMPLE EXERCISES IN CHAPTER extract the square feet figure an integer find the Angles Find the logarithms four figures fourth term geometrical progression given angle given leg given number given side horizontal angles hypothenuse inches instrument LOGARITHMIC SCALES Logarithmic Sine measured miles Multiply NOTE number of degrees object observed opposite the former opposite the latter Perp perpendicular PLANE TRIGONOMETRY Price PROBLEM II PROBLEM VII quadrant quotient radius remove the decimal right-angled triangle Secant sextant side opposite Sliding Rule spirit level square root station Subtract SUTHERLAND AND KNOX Table Tang tangent telescope theodolite third side three figures three sides Treatise versed-sine vertex vertical angle yards
Pasajes populares
Página 282 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Página 274 - RULE. — Subtract the square of the base from the square of the hypothenuse, and extract the square root of the remainder.
Página 377 - Key to above 60 3. Complete Practical Treatise on the Nature and Use of Logarithms, and on Plane Trigonometry, with Logarithmic and Trigonometrical Tables, . 5 0 4.
Página 245 - To find, then, by logarithms, the fourth term in a proportion, ADD THE LOGARITHMS OF THE SECOND AND THIRD TERMS, AND from the sum SUBTRACT THE LOGARITHM OF THE FIRST TERM.
Página 279 - From D as a center with a radius equal to a, draw an arc intersecting El in F and F'.
Página 292 - ... the angle of reflection is always equal to the angle of incidence, the image for any point can be seen only in the reflected ray prolonged.
Página 279 - Let abc (fig. 1 14) be a spherical triangle, whose sphere has its centre in o, and unity for radius. If now from c, on the plane aob, we let fall the perpendicular cd; from d on ae, bo, the perpendiculars de, df, and draw ce, cf; it would be easy to show that the triangles ceo, cfo are right angles...
Página 278 - To find a side, work the following proportion: — as the sine of the angle opposite the given side is to the sine of the angle opposite the required side, so is the given side to the required side.
Página 243 - BY LOGARITHMS. RULE. FROM the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.
Página 284 - That is, as the base, is to the sum of the two sides; so is the difference of the sides, to the sum of the segments of the base.