 These formulas serve as the definitions of the trigonometric functions of any angle; that is, the sine of any angle is the ratio of the side opposite to the hypotenuse; the tangent is the ratio of the side opposite to the side adjacent, etc.  Plane Trigonometry - Pàgina 591906 - 188 pàginesVisualització completa - Sobre aquest llibre
 | International Correspondence Schools - 1906 - 634 pàgines
...side adjacent ~ O d. _ side adjacent _ OC, side opposite /?, C, hypotenuse _ O /?, side opposite 2?t C, These formulas serve as the definitions of the...apply to them some algebraic rules relating to signs. In Fig. 3, the hypotenuse used for the determination of the functions of A^ is any portion OB^ of the... | |
 | 1914 - 428 pàgines
...In Fig. 3, if AB is 5 inches and BC is lj inches, what is the tangent of the angle A ? SOLUTION. — The tangent is the ratio of the side opposite to the side adjacent, or the ratio of BC to AB; hence, it is l|-^5 = 1.875-7-5 = .375. Ans. 14. Cotangent of Angle. — A... | |
 | Edward Ira Edgerton, Perry Amherst Carpenter - 1923 - 426 pàgines
...now ready to state the following definitions. The sine (abbreviated sin) of an acute (less than 90°) angle is the ratio of the side opposite to the hypotenuse. The cosine (abbreviated cos) of an acute angle is the ratio of the side adjacent to the hypotenuse. The... | |
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