anonymous
  • anonymous
Ships A and B leave port together. For the next two hours, ship A travels at 24mph in a direction 40 degree west of north while ship B travels 29 degree east of north at 32mph . what is the distance between the ships 2 hours later? What is the speed of ship A as seen by ship B?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
distance between them is 48*sin40+64*sin29 m
anonymous
  • anonymous
its that simple?
anonymous
  • anonymous
speed of A as seen by B ((32*cos29-24*cos40)^2+(32*sin29+24*cos40)^2)^0.5

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anonymous
  • anonymous
so the distance is 61.88 miles and speed is 35.23 mph? right?
anonymous
  • anonymous
sry it was not 4 u
radar
  • radar
Since this form a triangle where you are given two sides and their included angle (40+29) degrees, it is also possible to use the law of cosines where\[a ^{2}=b ^{2}+c ^{2}-2bc Cos69^{o}\] This provides a value of a (distance between ships) of 64.8 why their is a discrepancy of this value between the first solution I do not know.
anonymous
  • anonymous
hmm thanks! is the speed done the same way? as up there?
radar
  • radar
I haven't looked at the speed yet, I am trying to figure the rationale, I am thinking that Jas assumed the due north directional line formed a right angle with the line between the two ships, this I believe would be an assumption and not necessarily true.
radar
  • radar
maybe he will come back and explain his rationale! Meanwhile I ponder. lol
anonymous
  • anonymous
hehe thanks.. im working on a different problem now.
radar
  • radar
Jas, if you're back, the equation you posted for the speed ship A as observed by ship B do you intend for the square root to be taken for only the last parenthesis of for the sum of both parenthesis?

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