If a, and ā, are two non-collinear ...
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If a, and ā, are two non-collinear unit vectors and if ā, +ă, = 13, then the value of (ā, -ā,) (23, +ä,) is : (A)2 (B) 312 (C) 1/2 (D) 1.

JEE/Engineering Exams
Physics
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