By Richard N. Aufmann, Vernon C. Barker, Richard D. Nation

Available to scholars and versatile for teachers, collage Trigonometry, 6th variation, makes use of the dynamic hyperlink among suggestions and purposes to convey arithmetic to existence. by way of incorporating interactive studying suggestions, the Aufmann crew is helping scholars to higher comprehend ideas, paintings independently, and acquire better mathematical fluency. The textual content additionally contains know-how positive aspects to house classes that permit the choice of utilizing graphing calculators. extra application parts that aid scholar good fortune contain Eduspace instructional perform, on-line homework, SMARTHINKING stay on-line Tutoring, and tutorial DVDs.The authors' confirmed Aufmann Interactive strategy permits scholars to aim a ability because it is gifted in instance shape. This interplay among the examples and take a look at workouts serves as a checkpoint to scholars as they learn the textbook, do their homework, or research a bit. within the 6th variation, assessment Notes are featured extra prominently in the course of the textual content to aid scholars realize the main prerequisite abilities had to comprehend new techniques.

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**Additional resources for College Trigonometry (6th Edition)**

**Sample text**

50 In Exercises 19 to 26, solve each equation for the indicated variable. 19. x ϩ 2y 8; y 20. 3x Ϫ 5y 15; y 21. 2x ϩ 5y 10; x 22. 5x Ϫ 4y 10; x 23. ay Ϫ by c; y 24. ax ϩ by c; y 25. x y ;y 1Ϫy 26. x 2y Ϫ 3 ;y yϪ1 In Exercises 27 to 40, solve by using the quadratic formula. 27. x 2 Ϫ 2x Ϫ 15 0 28. x 2 Ϫ 5x Ϫ 24 0 29. x 2 ϩ x Ϫ 1 0 30. x 2 ϩ x Ϫ 2 0 31. 2x 2 ϩ 4x ϩ 1 0 32. 2x 2 ϩ 4x Ϫ 1 0 33. 3x 2 Ϫ 5x Ϫ 3 0 34. 3x 2 Ϫ 5x Ϫ 4 0 1 2 3 35. x ϩ xϪ10 2 4 2 2 1 36. x Ϫ 5x ϩ 0 3 2 In Exercises 59 to 66, use the critical value method to solve each inequality.

B. f͑3b͒ c. 3f ͑b͒ d. f͑a ϩ 3͒ e. f͑a͒ ϩ f ͑3͒ Solution a. f͑Ϫ5͒ ͑Ϫ5͒2 Ϫ 1 25 Ϫ 1 24 • Substitute ؊5 for x, and simplify. b. f͑3b͒ ͑3b͒2 Ϫ 1 9b2 Ϫ 1 • Substitute 3b for x, and simplify. In Example 1, observe that c. 3f͑b͒ 3͑b Ϫ 1͒ 3b Ϫ 3 • Substitute b for x, and simplify. f (3b) d. f͑a ϩ 3͒ ͑a ϩ 3͒2 Ϫ 1 a2 ϩ 6a ϩ 8 • Substitute a ؉ 3 for x. f͑a͒ ϩ f͑3͒ ͑a2 Ϫ 1͒ ϩ ͑32 Ϫ 1͒ • Substitute a for x; substitute 3 for x. take note 3f (b) 2 and that f (a ϩ 3) f (a) ϩ f (3) e. 2 a2 ϩ 7 • Simplify.

87. Endpoint ͑5, 1͒, midpoint ͑9, 3͒ 88. Endpoint ͑4, Ϫ6͒, midpoint ͑Ϫ2, 11͒ 89. Endpoint ͑Ϫ3, Ϫ8͒, midpoint ͑2, Ϫ7͒ 90. Endpoint ͑5, Ϫ4͒, midpoint ͑0, 0͒ 91. Find a formula for the set of all points ͑x, y͒ for which the distance from ͑x, y͒ to ͑3, 4͒ is 5. 92. Find a formula for the set of all points ͑x, y͒ for which the distance from ͑x, y͒ to ͑Ϫ5, 12͒ is 13. 93. Find a formula for the set of all points ͑x, y͒ for which the sum of the distances from ͑x, y͒ to ͑4, 0͒ and from ͑x, y͒ to ͑Ϫ4, 0͒ is 10.