Hi

Anybody knows how to solve this:

tan(x)-x=a

I was solving a problem which ended on solving this one, then I was trapped.

Thanks

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- Feb 26th 2011, 11:54 AMrezaA simple but mind twisting one
Hi

Anybody knows how to solve this:

tan(x)-x=a

I was solving a problem which ended on solving this one, then I was trapped.

Thanks - Feb 26th 2011, 11:57 AMAckbeet
That's a transcendental equation. You'll have to solve it numerically.

- Feb 26th 2011, 11:59 AMreza
Hi

Thanks, can you explain more? - Feb 26th 2011, 12:12 PMAckbeet
There is no known closed-form algebraic solution to that equation. The best you can do is, given a particular value for a, use a computer (most likely) to solve for x. You could try Newton-Raphson or something similar.