Q9 of 45 Page 1

If vector aand vector bare two unit vectors such that vector a + vector bis also a unit vector, then find the angle between vector a and vector b

Given that, are unit vectors



Now,



We know that,



⇒



⇒


⇒ 1 = 2+2 cosθ


⇒ 1-2 = 2 cosθ


⇒


⇒


⇒


⇒


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