Some three dimensional vector stuff. Latest addition is rotation in 3D space, requires two elements, rotation axis and the angle. The later could be in either degree or radians, just need to specify so to any of the functions to rotate a vector. Threre's six functions to rotate vectors in total, three of them assume the unitary vector for the specific axis ([1, 0, 0] for X axis, [0, 1, 0] for Y axis and [0, 0, 1] for Z axis), the other three may take an arbitrary vector for the rotation axis (not implemented yet).
******* VECTOR ROTATION *******
vector coordinates [x, y, z]: 1 0 0
[1.000000, 0.000000, 0.000000]
1. Rotate X axis [X]
2. Rotate Y axis [Y]
3. Rotate Z axis [Z]
4. Exit [E]
Axis: Z
Angle: 3.7
Is the angle in degrees? [Y/Yes] : [N/No] -> No
[-0.848100, -0.529836, 0.000000]
vector coordinates [x, y, z]: 1 0 0
[1.000000, 0.000000, 0.000000]
1. Rotate X axis [X]
2. Rotate Y axis [Y]
3. Rotate Z axis [Z]
4. Exit [E]
Axis: Z
Angle: 2.8
Is the angle in degrees? [Y/Yes] : [N/No] -> No
[-0.942222, 0.334988, 0.000000]
Corresponds to the piece of execution above.
Images source: GeoGebra