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Continguts

 TRIGONOMETRIC FUNCTIONS 1 CHAPTER II 17 ARTICLE PAGE 24 CHAPTER III 35 ARTICLE 52 CHAPTER IV 66 Formulas 92101 118120 92 CHAPTER V 102
 CHAPTER VII 126 Geometric proof of tan i A etc 141143 141 CHAPTER VIII 161 Formulas 162 and 163 175176 163 ARTICLE PAGE 252 Given two angles and the included side 258260 258 Given the three sides 265266 265 B The Mariners Compass 272273 272

 ARTICLE PAGE 121

Passatges populars

Pŕgina x - In any plane triangle, the sum of any two sides is to their difference, as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
Pŕgina 182 - I. The sine of the middle part is equal to the product of the tangents of the adjacent parts.
Pŕgina 148 - Two sides of a triangle, and the angle opposite one of them, being given, to describe the triangle. Let A and B be the given sides, and C the given angle.
Pŕgina 144 - The area of a triangle is equal to the product of its three sides divided by four times the radius of its circumscribed circle.
Pŕgina 166 - That is, the sines of the sides of a spherical triangle are proportional to the sines of the opposite angles.
Pŕgina 167 - The extremities of that diameter of a sphere which is perpendicular to the plane of a circle are called the poles of that circle.
Pŕgina 23 - If 2 men start from the same place and travel in opposite directions, one at the rate of 4 miles an hour, and the other at the rate of 5 miles an hour, how far apart will they be at the end of 1 hour ? At the end of 2 hours ? 5 hours?
Pŕgina 169 - C) + sin B sin C(— cos a). ... cos A = — cos B cos C + sin B sin C cos a. (3) Similarly, cos B = — cos C cos A + sin C sin A cos b, cos C = — cos A cos B + sin A sin B cos c.
Pŕgina 128 - CB : CA : : sin A : sin B. For, with A as a centre, and AD equal to the less side...