If a→ and b→ are two unit vectors such that a→+b→ is also a unit vector, then a⇀-b⇀ ______________________.

If a→ and b→ are two unit vectors such that a→+b→ is also a un

1.	If a→ and b→ are two unit vectors such that a→+b→ is also a unit vector, then a⇀-b⇀ ______________________.
Answer» If $\vec{a} and \vec{b}$ are two unit vectors such that $\|\vec{a} + \vec{b}\|$ is also a unit vector, then $\|\overset{⇀}{a} - \overset{⇀}{b}\|______________________.$