TS EAMCET · Maths · Vector Algebra
If \(x, y\) and \(z\) are non-zero real numbers and \(\hat{\mathbf{a}}=x \hat{\mathbf{i}}+2 \hat{\mathbf{j}}, \hat{\mathbf{b}}=y \hat{\mathbf{j}}+3 \hat{\mathbf{k}}\) and \(\hat{\mathbf{c}}=x \hat{\mathbf{i}}+y \hat{\mathbf{j}}+z \hat{\mathbf{j}}\) are such that \(\hat{\mathbf{a}} \times \hat{\mathbf{b}}=z \hat{\mathbf{i}}-3 \hat{\mathbf{j}}+\hat{\mathbf{k}}\), then \([\hat{\mathbf{a}} \hat{\mathbf{b}} \hat{\mathbf{c}}]\) equals to
- A \(3\)
- B \(10\)
- C \(9\)
- D \(6\)
Answer & Solution
Correct Answer
(C) \(9\)
Step-by-step Solution
Detailed explanation
Given, \(\mathbf{a}=x \hat{\mathbf{i}}+2 \hat{\mathbf{j}}, \quad \mathbf{b}=y \hat{\mathbf{j}}+3 \mathbf{k} \quad\) and \(\mathbf{c}=x \hat{\mathbf{i}}+y \hat{\mathbf{j}}+z \hat{\mathbf{k}}\)…
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