What is the angle between the two whose cross product is zero ?

What is the angle between the two vectors whose dot product is zero ?

What is the angle between two vectors whose vector product is zero ?

What is the angle between P and the cross product of (P+Q)and (P-Q) ?

What is the angle between P and Q the cross product of (P+Q)and (P-Q) ?

What is the angle between two vectors if the ratio of their dot product and the magnitude of cross product is sqrt3 ?

What is the angle between two vectors if the ratio of their dot product and the magnitude of cross product is sqrt(3)

If the angle between two vector veca and vecb is zero then