Diagram Of A Boat Sail Maths Alevel Mechanics, Cosine Rule, Bearings, Boats Journey Problem?
Maths Alevel Mechanics, Cosine Rule, Bearings, Boats Journey Problem? - diagram of a boat sail
A boat travels at a speed of 11 knots to the east. The current flows in a direction of 210 ° at a speed of 6 knots. What is the resultant velocity of the boat.
With a chart with the cosine law to solve this problem, it is fairly simple. .
http://i166.photobucket.com/albums/u94/j ...
That is my plan, but would for some reason used the book for cos30 and cos60. WHY ?!?!?!?!
Please give us a solution - and an explanation (preferably with a description of a picture or a drawing one) that I will explain why using cos30 that could replace cos60.
Best answer: 5 stars.
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1 comments:
The picture looks good to me
but I | X | = 9.539392 (6DP) (equivalent to 60 °)
Perhaps the book has made a mistake?
Perhaps the current direction is designed to 240 °?
Note: The table has 5 knots in your question, you have 6 knots, but does not seem to influence the reaction at 60 ° (it has with the 30 if)
I think he meant 6 knots, and the card is a typo
PS, I really do not care how many stars you give me, but 10 points would be nice:)
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