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Re: Solving Transcendental Equations ~ sin(x)/x
Posted:
Nov 26, 2012 5:17 AM


On 11.10.12 06:33, ehahn wrote: >>> syms y; >>> p=0; >>> k = 2*pi;.01:2*pi; >>> s='P*sin(y*a)/(y*a)+cos(y*a)=cos(x*a)'; >>> solve(s) > Warning: Explicit solution could not be found.
I'm not sure why you included setting values for p and k above, you are not even trying to use them. And if you did, that would not work as long as you kept using string input to solve.
Besides, I'm not sure what kind of answer you expect. In set notation, and ignoring special cases like a=0, any x from the set
{ / P sin(a y) \  } { acos cos(a y) +   + 2 pi k  } { \ a y /  } {   k in Z_ } union { a  }
{ / P sin(a y) \  } { acos cos(a y) +   + 2 pi k  } { \ a y /  } {    k in Z_ } { a  }
would be a solution ? where that set with a bar in there means ?the set of all suchandsuch, where k ranges over the integers.? In which format should MATLAB give you this answer so it helps with your next computation steps?
Christopher



