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TS EAMCET · Maths · Vector Algebra

If \(\mathbf{a}=2 \hat{\mathbf{j}}-3 \hat{\mathbf{j}}+\hat{\mathbf{k}}, \mathbf{b}=\hat{\mathbf{i}}-\hat{\mathbf{j}}+2 \hat{\mathbf{k}}\) and \(\mathbf{c}=2 \hat{\mathbf{i}}+\hat{\mathbf{j}}+\hat{\mathbf{k}}\) are three vectors, then \(|(\mathbf{a} \times \mathbf{b}) \times \mathbf{c}|=\)

  1. A \(|\mathbf{a} \times(\mathbf{b} \times \mathbf{c})|\)
  2. B \(\frac{\sqrt{39}}{\sqrt{11}}|\mathbf{a} \times(\mathbf{b} \times \mathbf{c})|\)
  3. C \(\sqrt{\frac{11}{39}}|\mathbf{a} \times(\mathbf{b} \times \mathbf{c})|\)
  4. D \(\sqrt{11}|\mathbf{a} \times(\mathbf{b} \times \mathbf{c})|\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(\sqrt{\frac{11}{39}}|\mathbf{a} \times(\mathbf{b} \times \mathbf{c})|\)

Step-by-step Solution

Detailed explanation

We have,…