I thought I would never use the math that I was taught in college - then I did some work on Pixar's 3D library (matrix algebra) and PDF rasterization (lots of geometry). I did some curve fitting and FFT when I was interfacing a UI to a device which captured raw sensor data. I did some robotics programming (linear algebra again), and I've recently wished that I took even more math to understand some of the current Deep Learning research. I think the real problem is that math is taught out of context, rather than as a tool to solve a problem.
