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Britney worked this problem, but made a mistake. Line 1: 6.22 = 9.22 + 8.92 – 2 (9.2) (8.9) cos 0 - 6.22 Line 2: = cos 0 9.22 + 8.92 – 2 (9.2) (8.9) 6.22 -1 Line 3: 0 = cos %3D 9.22 + 8.92 - 2 (9.2) (8.9)

Britney worked this problem, but made a mistake. Line 1: 6.22 = 9.22 + 8.92 – 2 (9.2) (8.9) cos 0 - 6.22 Line 2: = cos 0 9.22 + 8.92 – 2 (9.2) (8.9) 6.22 -1 Line 3: 0 = cos %3D 9.22 + 8.92 - 2 (9.2) (8.9)

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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a.which line did she make a mistake? justify b. rewrite her answer
In the 2022 Winter Olympics in Beijing, Genting Snow Park hosts the skiing competitions. The starting ramp for one of the competitions creates a triangle with the mountain. If the ramp is 9.2 feet long and it extends 8.9 feet down the mountain and measures 6.2 feet tall, what angle does the ramp make with respect to the mountain? (Picture not drawn to scale) 9.2 ft 6.2 ft 8.9 ft
Transcribed Image Text:In the 2022 Winter Olympics in Beijing, Genting Snow Park hosts the skiing competitions. The starting ramp for one of the competitions creates a triangle with the mountain. If the ramp is 9.2 feet long and it extends 8.9 feet down the mountain and measures 6.2 feet tall, what angle does the ramp make with respect to the mountain? (Picture not drawn to scale) 9.2 ft 6.2 ft 8.9 ft
Britney worked this problem, but made a mistake. Line 1: 6.22 = 9.22 + 8.92 – 2 (9.2) (8.9) cos 0 - 6.22 Line 2: cos O %3D 9.22 + 8.92 – 2 (9.2) (8.9) - 6.22 Line 3: 0 = = COS 9.22+8.92- 2 (9.2) (8.9)
Transcribed Image Text:Britney worked this problem, but made a mistake. Line 1: 6.22 = 9.22 + 8.92 – 2 (9.2) (8.9) cos 0 - 6.22 Line 2: cos O %3D 9.22 + 8.92 – 2 (9.2) (8.9) - 6.22 Line 3: 0 = = COS 9.22+8.92- 2 (9.2) (8.9)
Expert Solution
Step 1

(a) In line 2 there is a mistake.

We can't factor out cosθ from 9.22 and 8.92 like she did.

For example We can factor out c from following expression,ac+bc+dc ac+bc+dc = (a+b+d)cand we can't for following expression,a+b+dc

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