Plane Trigonometry |
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Common terms and phrases
acute algebraic base calculated called centre changes CHAPTER Check circle Compare computation construction contains cosē cosec cosine deduced definitions denoted Derive described difference direction distance draw drawn earth equal equation EXAMPLES exercises expression figure Find formulas geometry give given greater height Hence horizontal included increases inscribed intersection known length less logarithms mathematics means measure method namely negative NOTE observed obtained opposite perpendicular places plane polar pole polygon positive problems Prove quadrant quantity radian measure radius ratios relations represented respectively right angles Show shown sides similar sinē sine solution Solve sphere spherical triangle student subtended surface tables taken taking tangent third tower triangle ABC trigonometric trigonometric functions trigonometric ratios
Popular passages
Page 52 - A sin B sin C Cosine Law: cos a = cos b cos c + sin b sin c cos A cos b = cos c cos a + sin c sin a cos B cos c = cos a cos b...
Page 42 - I. The sine of the middle part is equal to the product of the tangents of the adjacent parts.
Page 108 - The sum of the angles of a spherical triangle is greater than two and less than six right angles ; that is, greater than 180° and less than 540°. (gr). If A'B'C' is the polar triangle of ABC...
Page 74 - The area of the surface of a sphere is four times the area of a great circle.
Page 108 - In any triangle the square of any side is equal to the sum of the squares of the other two sides minus twice the product of these two sides and the cosine of their included angle.
Page 72 - The lateral area of a frustum of a cone of revolution is equal to one-half the sum of the circumferences of its bases multiplied by its slant height. Hyp. S is the lateral area, C and C...
Page 62 - Geometry that the area of a triangle is equal to one-half the product of the base by the altitude. Therefore, if a and b denote the legs of a right triangle, and F the area, F THE RIGHT TRIANGLE.
Page 128 - It follows that the ratio of the circumference of a circle to its diameter is the same for all circles.
Page 200 - Show that the area of a regular polygon inscribed in a circle is a mean proportional between the areas of an inscribed and circumscribing polygon of half the number of sides.
Page 202 - Find the area of a regular polygon of n sides inscribed in a circle, and show, by increasing the number of sides of the polygon without limit, how the expression for the area of the circle may be obtained. 13. (a) Find the distance at which a building 50 ft. wide will subtend an angle of 3'. (6) A church spire 45 ft. high subtends an angle of 9
Bibliographic information
| Title | Plane Trigonometry |
| Author | Daniel Alexander Murray |
| Publisher | Longmans, Green, and Company, 1906 |
| Original from | Harvard University |
| Digitized | 2 Mar 2007 |
| Export Citation | BiBTeX EndNote RefMan |