I am reading a little on introductory QM , initial chapters on waves.
They have given an integral for a wavepacket , assuming at t= 0.
Which is: ψ(x,0) = [itex]\int A cosk'x dk'[/itex] (I don't know how to define limits to the integral in Latex upper = k+Δk , lower limit = k-Δk)
which gives ψ(x,0) = S(x)coskx , where S (x) = 2AΔK sin(Δkx)/(Δkx).
Integration by parts ?
The Attempt at a Solution
Now I am totally brain stuck , it surely can't be anything complex so I should be able to do it by parts.
Let u =cosk'x and dv = dk'
Or am I overlooking something ?