If where are scalars and a, b, c are mutually perpendicul…

Maths Vector Algebra Scalar or Dot Product of Two Vectors and its Applications Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 12, 2026

If where are scalars and a, b, c are mutually perpendicular vectors, then

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The correct answer is:

Squaring both sides, we get

But are mutually perpendicular

So, and are equal to zero.

Therefore, are equal to zero because and cannot be equal to zero.

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