If vector(a and b) are unit vector such that vector(a + b) is also a u – InterviewSolution

1.	If vector(a and b) are unit vector such that vector(a + b) is also a unit vector. Then the angle between the vector(a and b) is :(A) π/6(B) π/6(C) 4π/3(D) 2π/3
Answer» Answer is (D) 2π/3

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