# help me to Solve a trick equation

I am trying to solve a trick question that my teacher gave to me.

This question is related to linear algebra.

I have no idea on where to start with this question. I need some guidance in getting started. $$x-\sin(x) = \pi/4$$

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Soooooooooooo what is the question? –  Fixed Point Nov 29 '12 at 8:51
How is this linear algebra? –  diimension Nov 29 '12 at 9:47

You will not get an explicit solution. There is exactly one real root, around $1.76634$, which can be found by numerical root finding. I am sure that is what Alpha uses. The techniques are described in any numerical analysis text, but not linear algebra.