## Elements of Plane Trigonometry |

### From inside the book

Results 6-10 of 100

Page 2

...

...

**Trigonometry**take also for the unit of angular measure the number of degrees in an angle , subtended by an arc equal to the radius * . If U re- present that angle , then by equation ( 1 ) , * If ACB be an angle at the centre of a circle ... Page 3

... find how many grades and minutes are contained in this angle , here E + E : - 22.4608 E 9 E 9 = 2.4956 24.9564 , which at sight is 245 95 ′ 64 ′′ . Find the number of degrees and minutes in 46 ° B 2

... find how many grades and minutes are contained in this angle , here E + E : - 22.4608 E 9 E 9 = 2.4956 24.9564 , which at sight is 245 95 ′ 64 ′′ . Find the number of degrees and minutes in 46 ° B 2

**TRIGONOMETRY**. 3 180° r ... Page 4

... ) - Compare the interior angles of a regular octagon and dodecagon : 360 ° In a polygon of n sides , Æ ° = 180 ° n 360 ° In octagon 180 ° - = 180 ° -- 45 ° 135 ° . 8 4 360 ° In dodecagon = 180 ° . = 180 4

... ) - Compare the interior angles of a regular octagon and dodecagon : 360 ° In a polygon of n sides , Æ ° = 180 ° n 360 ° In octagon 180 ° - = 180 ° -- 45 ° 135 ° . 8 4 360 ° In dodecagon = 180 ° . = 180 4

**TRIGONOMETRY**. Page 5

... . ( 7 ) The interior angles of a rectilineal figure are in arith- metical progression , the least angle is 120 ° , and the common difference 5 ; required the number of sides . Sum of angles = 17 - 2π by Euc .

... . ( 7 ) The interior angles of a rectilineal figure are in arith- metical progression , the least angle is 120 ° , and the common difference 5 ; required the number of sides . Sum of angles = 17 - 2π by Euc .

**TRIGONOMETRY**. 5.### Other editions - View all

### Common terms and phrases

1+tan AB² AC² angle ACB AP AP AP AP² ARITHMETIC Asin Atan B+cot centre circular measure circumference cos² cos³ cosec cosine cot 4+cot cot A cot cot² OCA diameter distance equal equation Euclid feet Find the number formula given GRAMMAR height Hence hexagon inscribed circle IVY LANE J. R. Young King's College School log blog logarithms nth root number of degrees number of sides perimeter perpendicular plane triangle quadrant radii radius ratio regular polygon Rudimentary Treatise sec² shew sin A cos sin A sin sin¹ sin2 sin² 18 sin³ sine and cosine square subtend subtracted T. H. L. Leary tan-¹ tan² tangent triangle ABC Trigonometry unity VIRTUE BROTHERS W. D. Hamilton

### Popular passages

Page 122 - Gd. 131. READY-RECKONER FOR MILLERS, FARMERS, AND MERCHANTS, showing the Value of any Quantity of Corn, with the Approximate Values of Mill-stones & Mill Work.

Page 122 - Tables for the Calculation of Simple Interest, with Logarithms for Compound Interest, and Annuities, by W. Hipsley. Is. 85*. SUPPLEMENT TO THE ABOVE, Is. 85 and 85* in 1 vol., 2s.

Page 119 - TOWNS, 2 vols. in 1, 3s.) 31. WELL-SINKING, BORING, AND PUMP WORK, by JG Swindell, revised by GR Burnell. Is.

Page 121 - Baker. 2s. 61*. READY RECKONER for the Admeasurement and Valuation of Land, by A. Arman. Is. 6d. 76. GEOMETRY, DESCRIPTIVE, with a Theory of Shadows and Perspective, and a Description of the Principles and Practice of Isometrical Projection, by JF Heather. 2s. 83.

Page 115 - EMIGRANT'S GUIDE TO TASMANIA AND NEW ZEALAND, by James Baird, BA [In Preparation. FINE ARTS. 20. PERSPECTIVE, by George Pyne. 2s. 27. PAINTING ; or, A GRAMMAR OF COLOURING, by G. Field. 2s. 40. GLASS STAINING, by Dr. MA Gessert, with an Appendix on the Art of Enamel Painting, &c.

Page 6 - A KEY AND COMPANION to the above Book, forming an extensive repository of Solved Examples and Problems in Illustration of the various Expedients necessary in Algebraical Operations. By JR YOUNG, is.

Page 116 - Gd. 113* MEMOIR ON SWORDS, by Marey, translated by Lieut-CoL HH Maxwell. Is. 140. OUTLINES OF MODERN FARMING, by R. Scott Burn. Vol. I. Soils, Manures, and Crops. 2s. 141. Vol. II. Farming Economy, Historical and Practical. 3s. 142. Vol.

Page 118 - JVbs. 128 and 130 in 1 vol. cloth boards, 7s. 132. ERECTION OF DWELLING-HOUSES, with Specifications, Quantities of Materials, &c., by SH Brooks, 27 Plates. 2s.

Page 91 - ... 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.

Page 117 - EMMENS. is. 6d. 152. PRACTICAL HINTS FOR INVESTING MONEY. With an Explanation of the Mode of Transacting Business on the Stock Exchange. By FRANCIS PLAYFORD, Sworn Broker.