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NDA 2014
Exam
NDA
Year
2014
Subject
Mathematics
Chapter
Vector Algebra

NDA 2014 · Mathematics · Vector Algebra

a + b + c = 0 such that | a | 3,| b |=5 and | c |=7 . What is the...

a⃗+b⃗+c⃗=0→\vec{a}+\vec{b}+\vec{c}=\overrightarrow{0} such that ∣a⃗∣3,∣b⃗∣=5|\vec{a}| 3,|\vec{b}|=5 and ∣c⃗∣=7|\vec{c}|=7. What is the angle between a⃗\vec{a} and b⃗\vec{b} ?

Options

  1. Aπ6\frac{\pi}{6}
  2. Bπ4\frac{\pi}{4}
  3. Cπ3\frac{\pi}{3}
  4. Dπ2\frac{\pi}{2}

Correct answer

C. π3\frac{\pi}{3}

Step-by-step solution

The correct answer is option (C)
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