if you are just after the number of solutions for rather than the solutions themselves, you can just sketch them and count how many times they intersect.
Last edited by pickslides; May 31st 2009 at 02:42 PM.
Reason: typo
it is the ntersection of segement of right and not a right with the graph of function sin (x) xest coach between-100 and 100 100=33pi pi=3.14 -33 pi <= x <= 33 pi