1. The problem statement, all variables and given/known data So I have this normalized wave function psi=sqrt(2/a) * sin^2(pi*x/a) with limits of 0 and a. I'm supposed to find the probability for a bunch of points if this form: p(x=0.00a,x=0.002a) 2. Relevant equations P(a,b)=int(psi^2)dx 3. The attempt at a solution So, partially solving the integral, I'm stuck here: (2/a) * [ (x/2) - (a/4pi) * sin(2*pi*x/a) ] between 0 and a My first question. If I continue to solve the definate integral P=1. This is appearently not the correct answer. I know my calculus is right and I've verified it in wolfram alpha and octave. Once I figure out how to proceed I need to plug in these values which have a in them, not really sure how that is going to work out either. Any suggestions?