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NDA 2014
Exam
NDA
Year
2014
Subject
Mathematics
Chapter
Vector Algebra

NDA 2014 · Mathematics · Vector Algebra

Paragraph : Let | a |=7, | b |=11 , | a + b |=10 3 Question : What...

Paragraph : Let ∣a⃗∣=7,∣b⃗∣=11|\vec{a}|=7, \quad|\vec{b}|=11, ∣a⃗+b⃗∣=103|\vec{a}+\vec{b}|=10 \sqrt{3}Question : What is the angle between (a⃗+b⃗)(\vec{a}+\vec{b}) and (a⃗−b⃗)(\vec{a}-\vec{b}) ?

Options

  1. Aπ2\frac{\pi}{2}
  2. Bπ3\frac{\pi}{3}
  3. Cπ6\frac{\pi}{6}
  4. DNone of the above

Correct answer

D. None of the above

Step-by-step solution

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