Hi, I need to find all roots to the equation This is what i tried: And the angle of -16i is 270 degrees or All the roots are on the form So the first root should be But it's just not correct.
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Originally Posted by Jones Hi, I need to find all roots to the equation This is what i tried: And the angle of -16i is 270 degrees or All the roots are on the form So the first root should be But it's just not correct. Why do you say that? It is one of the roots.
Are you sure? gives
Originally Posted by Jones I need to find all roots to the equation Here is the standard way to do all of these ‘root’ problems. . Let Let Now it is really simple to list the four roots:
Last edited by Plato; Feb 6th 2010 at 04:48 PM.
Originally Posted by Jones Are you sure? gives Of course I am sure.
An alternative method is to remember that if you're taking the 4th root, there will be 4 roots, and they are all evenly spaced around a circle.
Originally Posted by Jones Are you sure? gives No, it doesn't! , not 0. cosine is 0 only at odd multiples of .
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