To find the angle of rotation of a conic section, we have fisrs to see the following form of the equation:

Given thah form, we can find the angle of rotation by the equation:

From first the given section:

We get that A = 17, B = 32 and C = -7. So,

The angle of the first given section is 26.6°.
Now, for the second one:

We have A = 32, B = 50 and C = 7, so:

The angle of the second given section is 32.7°.