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Oct 27th, 2002, 04:40 AM
#1
Thread Starter
Frenzied Member
Definition of a Natural Number - Needed to solve a Trignometric Equation
I've been working on this off and on for a very very long time now. I'm stuck Can the below be solved at all
Code:
Sqr(A*Tan(t)) = N ; Where N is natural number
for a given natural constant "A", with "t" ranging from 45 degrees to 90 degrees
Is it solvable?
"Brothers, you asked for it."
...Francisco Domingo Carlos Andres Sebastian D'Anconia
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Oct 27th, 2002, 05:55 AM
#2
So Unbanned
Hmmm
well
a=-n^2/tan(t) and n =< 0
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Oct 27th, 2002, 06:13 AM
#3
Thread Starter
Frenzied Member
"Brothers, you asked for it."
...Francisco Domingo Carlos Andres Sebastian D'Anconia
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Oct 27th, 2002, 10:03 AM
#4
Fanatic Member
tan0=0
tan45=1
A*tan(t) - goes from 0 - A
sqrt(A*tan(t)) - goes from 0 - sqrt(A)
so your answer would be all natural numbers between 0 - sqrt(A)
Massey RuleZ! ^-^__  Cheers!  __^-^ Massey RuleZ!
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The probability that a random rational number has an even denominator is 1/3 (Salamin and Gosper 1972)? This result is independently verified by me (2002)!
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Oct 28th, 2002, 01:00 AM
#5
Thread Starter
Frenzied Member
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Nov 1st, 2002, 04:00 PM
#6
Frenzied Member
Here is the definition - and it's only integers, not all of the reals.
It's denoted usually as N
http://mathworld.wolfram.com/NaturalNumber.html
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Nov 2nd, 2002, 03:52 AM
#7
Thread Starter
Frenzied Member
Thanx. Not much help, but a darned good site. Bookmark worthy
Thanx again
"Brothers, you asked for it."
...Francisco Domingo Carlos Andres Sebastian D'Anconia
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Aug 1st, 2003, 10:59 AM
#8
Lively Member
Sqr(A*Tan(t)) = N
KayJay posted:
Sqr(A*Tan(t)) = N ; Where N is natural number for a given natural constant "A", with "t" ranging from 45 degrees to 90 degrees
First, note that the tangent of 45 degrees =1, and the tangent of 90 degrees = infinite, So, for “t”
Ranging from 45 degrees to 90 degrees, we can re-write the equation as:
Sqr(A*B) = N, where B is any real number from 1 to infinity.
The next thing to know is, does “Sqr” stand for “the square of” or for “the square root of”?
1) For “the square root of”, we have:
(A*B)^1/2 = N
A*B = N^2
B = N^2/A
There are an infinite solutions to this equation, it seems obvious to me. For example:
For N = 1, then B = N^2/A = 1/A
If A = 1, then B = 1/1 = 1
If A = 2, then B = 1/2
Etc.
For N = 2, then B = N^2/A = 4/A
If A = 1, = 4/1
If A = 2, then B = 4/2 = 2
Etc.
2) 2) For “the square of”, we have:
(A*B)^2 = N^2
A*B = N, or A*B = -N
B = N/A, or B = -N/A
This also has infinite solutions, and I think that obtaining a vlue of B for each combination of N and A is obvious, so, I will stop at this point.
Oh, yes! If you MUST have the angle, than you would proceed to obtain the angle by stating that
arctangent (t) = B, and proceeding to solve for t, in radians or in degrees, as desired.
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