(1) Trigonometry 8

To find the height at 4 seconds plug the time into

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Unformatted text preview: o your equation. c-value: For the cosine graph, there is none. 2π t + 15 5 2π h(4) = −7 cos (4) + 15 5 h(4) = 12.8m d-value: The midline is at 15. Or, use 2nd max − min 22 − 8 14 = = =7 2 2 2 2π 2π b= = 5 P h(t ) = −7 cos amplitude = b-value: max + min 22 + 8 30 midline = = = = 15 2 2 2 2π h(t ) = −7 cos t + 15 5 The cosine pattern is upside down, so we need a negative. Height (m) b) Trace Value x=4 d) 25 In the first cycle, the point is above 17 m between 1.48 s and 3.52 s, for a total of 2.04 seconds. Since the second cycle is identical to the first, the total time spent above 17 m is 4.08 s. 20 15 10 5 2 4 6 8 10 Time (s) Pre – Calculus Math 40S: Explained! www.math40s.com 80 Trigonometry Lesson 8: Part I – Ferris Wheel ANSWERS 3 0 5. a) The midline is at 15 m, and the radius is 13 m, so the maximum height is 28 m. b) The maximum occurs at the beginning of the cy...
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This note was uploaded on 02/09/2011 for the course 168 comm 168 taught by Professor Kiscabean during the Winter '10 term at UCLA.

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