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John Nolton
Posts: 15
Joined: 10/11/2011
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Problem 284 Final comments |
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Along with the typo error and the omission of the variable m as used by Lindell in equation [3] (see my 1st post on problem 284) there are still problems with the presentation of the solution.
See Lindell's solution:
Equation [3] reads; 4*Cos^3 m -2*Cos^4 m -3*Sin^3 m -2*Sin^4 m = 0 (here the red m is missing in Lindell solution). The solution to this equation is 39d45m10.1981s NOT 51d05m02.54s as Lindell shows, although 51d05m02.54s IS THE CORRECT answer to this problem to the number of places shown. Lindell has left something out of equation [3] in his solution and therefore cannot be solved to get the correct answer.
I would also like to add that in this type of problem I would not round UP in the length of the table, 11.65 (Lindell's calculation) because you might just nick the wall. 11.6494 might be a better answer ? (just for the heck of it to more places m= 51d 05m 02.5396884 + seconds).
John Nolton
Tombstone, AZ
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Thursday, January 9, 2014 at 1:30:06 PM |