did the OP mean $\displaystyle \sin(x + \pi)$ or $\displaystyle (\sin{x} + \pi)$ ???
I meant the latter, (my original). I do realise this can't be done with elementary algebra, what I would be interested in seeing such a step-by-step algebraic(ish) method.
I meant the latter, (my original). I do realise this can't be done with elementary algebra, what I would be interested in seeing such a step-by-step algebraic(ish) method.
the zero is somewhere around -3. (from graphing). you can approximate it better using iteration methods like the Newton-Raphson method or something