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Need solution for RD Sharma Maths Class 12 Chapter 24 Vector Or Cross Product Exercise Very Short Answer Question, question 31.

Answers (1)

ANSWER:

  \pi

HINT:

Use formula \vec{a} \times(\vec{b})=\{-\vec{b} \times \vec{a}\}

GIVEN:

Vectors \vec{a} \times \vec{b} \& \vec{b} \times \vec{a} 

SOLUTION:

Let,

\theta =Angle between two vectors.

We know that

\vec{a} \times \vec{b}=[-\vec{b} \times \vec{a}]

Since cross vector contains \sin _{\theta}

So \sin _{\theta} is always -1 at {\theta}=180 or \pi

Thus \theta =\pi

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