11-07-2013, 04:31 PM
I just got my HP Prime and I'm still at the beginning to learn it's features. I'm not sure whether the following is an already known problem:
When I'm in the CAS view and in polar mode ("Polar" app is activated) and press the key for the independent variable (x, t, theta, n) instead of "theta" only an empty white rectangle is shown. It seems to be just a display/font problem, since all computations/substitutions/evalutations work properly with this "rectangle" instead of the "theta".
See the "screenshot" below: