Plane TrigonometryLongmans, Green, and Company, 1906 |
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Page v
... trigonometry , there appears still to be room for one which shall avoid the extremes of expansion and brevity . Some of the most thorough and scholarly of these contain a great variety of matters which it is impossible to consider in ...
... trigonometry , there appears still to be room for one which shall avoid the extremes of expansion and brevity . Some of the most thorough and scholarly of these contain a great variety of matters which it is impossible to consider in ...
Page vi
... trigonometric ratios and angular analysis than is sufficient to enable the beginner to understand clearly the arithmetical part of the science , and its simple practical applica- tions . This arrangement seems to have several advantages ...
... trigonometric ratios and angular analysis than is sufficient to enable the beginner to understand clearly the arithmetical part of the science , and its simple practical applica- tions . This arrangement seems to have several advantages ...
Page ix
... Trigonometric ratios defined for acute angles 9 • 12 15 · 18 20 13. Definite and invariable connection between acute angles and trig- onometric ratios 14. Practical problems 15. Trigonometric ratios of 45 ° , 60 ° , 30 ° , 0 ° , 90 ...
... Trigonometric ratios defined for acute angles 9 • 12 15 · 18 20 13. Definite and invariable connection between acute angles and trig- onometric ratios 14. Practical problems 15. Trigonometric ratios of 45 ° , 60 ° , 30 ° , 0 ° , 90 ...
Page x
... TRIGONOMETRIC RATIOS OF ANGLES IN GENERAL . 36. Directed lines . 37. Trigonometric definition of an angle . Angles unlimited in magni- tude . Positive and negative angles 38. Supplement and complement of an angle 39. The convention of ...
... TRIGONOMETRIC RATIOS OF ANGLES IN GENERAL . 36. Directed lines . 37. Trigonometric definition of an angle . Angles unlimited in magni- tude . Positive and negative angles 38. Supplement and complement of an angle 39. The convention of ...
Page xi
... trigonometric ratios 44. Relations between the trigonometric ratios of an angle 45. Ratios of 90 ° — A , 90 ° + A , 180 ° — A , — A . 72 74 · 75 77 79 CHAPTER VI . TRIGONOMETRIC RATIOS OF THE Sum and the DIFFERENCE OF Two ANGLES ...
... trigonometric ratios 44. Relations between the trigonometric ratios of an angle 45. Ratios of 90 ° — A , 90 ° + A , 180 ° — A , — A . 72 74 · 75 77 79 CHAPTER VI . TRIGONOMETRIC RATIOS OF THE Sum and the DIFFERENCE OF Two ANGLES ...
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Common terms and phrases
A+B+C acute angle algebraic centre CHAPTER circumscribing computation cos² cosec cotangent deduced denoted Derive diedral angle draw equal equator EXAMPLES expression figure Find the distance formulas geometry given Hence hypotenuse included angle inscribed circle intersection latitude law of cosines law of sines length logarithms mantissa mathematics meridian method NOTE number of degrees number of sides opposite perpendicular plane triangle Plane Trigonometry polar triangle pole positive quadrant radian measure radii radius regular polygon relations respectively right angles right triangles right-angled triangle secant Show sides and angles sin² solid angle solution Solve ABC sphere spherical angle spherical degree spherical excess spherical polygon spherical triangle spherical trigonometry subtended surface tables tan² tangent terminal line three angles tower triangle ABC trigono trigonometric functions trigonometric ratios π π
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