I have an exam in two days!
And I'm tearing my hair out (and so are all of my friends - I've asked 12 people this question and none of them know how to do it)...
Must use algebraic method for working (not allowed to use graphs).
Please help quickly!
Thanks for replying!
We are allowed to use calculus (I think this might be a calculus question - they aren't specifically set out in sections or anything like that).
In terms of the binary search thing, we use a graphical method (using GDCs), and just plugged in y=xsin(x) and y=5 and found the intercepts, which occured at +/- 17.05 (rounded to 4 sf). But we still don't know how to get to this answer via non-graphical means.
Hopefully that helps with trying to answer the question! ANY leads are appreciated =)
(and just for fun, someone else asked us "xsin(x)=0 x=?")