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NDA 2014
Exam
NDA
Year
2014
Subject
Mathematics
Chapter
Vector Algebra

NDA 2014 · Mathematics · Vector Algebra

What is the interior acute angle of the parallelogram whose sides...

What is the interior acute angle of the parallelogram whose sides are represented by the vectors 12i^+12j^+k^\frac{1}{\sqrt{2}} \hat{i}+\frac{1}{\sqrt{2}} \hat{j}+\hat{k} and 12i^−12j^+k^?\frac{1}{\sqrt{2}} \hat{i}-\frac{1}{\sqrt{2}} \hat{j}+\hat{k} ?

Options

  1. A60∘60^{{}^{\circ}}
  2. B45∘45^{{}^{\circ}}
  3. C30∘30^{{}^{\circ}}
  4. D15∘15^{{}^{\circ}}

Correct answer

A. 60∘60^{{}^{\circ}}

Step-by-step solution

The correct answer is option (A)
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