Question

what is the angle between P vector cross Q vector and P vector + Q vector​

Answer 1

VectorQ×VectorP -Same like mentioned above. This will lie in plane perpendicular to the vectors P and Q but opposite to Vector P ×Vector Q . Thus.. since VectorP×VectorQ and VectorQ×VectorP are opposite in direction,So the angle between them would be 180 degrees.

Answer 2

The angle between p vector and Q vector must be 180 degrees