AP 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, \(\quad \mathbf{a}=x \hat{\mathbf{i}}+2 \hat{\mathbf{j}}, \quad \mathbf{b}=y \hat{\mathbf{j}}+3 \mathbf{k} \quad\) and \(\mathbf{c}=x \hat{\mathbf{i}}+y \hat{\mathbf{j}}+z \hat{\mathbf{k}}\)…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Maths
- By the definition of the definite integral, the value of \(\lim _{n \rightarrow \infty}\left[\frac{1^2}{1^3+n^3}+\frac{2^2}{2^3+n^3}+\ldots+\frac{r^2}{r^3+n^3}+\ldots+\frac{1}{2 n}\right]=\)AP EAMCET 2017 Easy
- If the lines \(4 x+3 y-1=0, x-y+5=0\) and \(k x+5 y-3=0\) are concurrent then \(k\) is equal toAP EAMCET 2021 Easy
- If \(y=\sqrt{2 x+\cos ^2\left(2 x+\frac{\pi}{4}\right)}\), then \(\frac{d y}{d x}\) at \(x=\frac{\pi}{4}\).AP EAMCET 2020 Easy
- If is a cyclic quadrilateral with and , thenAP EAMCET 2019 Easy
- The area of the parallelogram, whose diagonals are and is equal toAP EAMCET 2020 Easy
- \(\int \frac{\sin ^3(x)+\cos ^3(x)}{\sin ^2(x) \cdot \cos ^2(x)} d x=\)AP EAMCET 2020 Medium
More PYQs from AP EAMCET
- If \(y=3 x\) is a tangent to a circle with centre \((1,1)\), then the other tangent drawn through \((0,0)\) to the circle isAP EAMCET 2005 Easy
- \((60 \hat{i}+15 \hat{j}-3 \hat{k}) N\) force produces a velocity \((2 \hat{i}-4 \hat{j}+5 \hat{k})\) in a particle. The value of power at that time will beAP EAMCET 2020 Easy
- If four points are taken on each of three parallel lines in a plane, then the maximum number of triangles formed with these points isAP EAMCET 2018 Hard
- Assertion (A) : Transition elements have higher enthalpies of atomization.
Reason (R) : Large number of unpaired electrons present in transition elements facilitate strong interatomic interaction and strong bonding between atoms.AP EAMCET 2022 Easy - A pair of adjacent coils having a mutual inductance, \(M\). The current in one coil changes from 0 to \(16 \mathrm{~A}\) in \(0.3 \mathrm{~s}\) and the change of flux linkage with the other coil is \(40 \mathrm{~Wb}\). The value of \(M\) isAP EAMCET 2022 Easy
- The emf (in V) of a Daniell cell containing \(0.1 \mathrm{MZnSO}_4\) and \(0.01 \mathrm{M} \mathrm{CuSO}_4\) solutions at their respective electrodes is
\(\left(E_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{\circ}=+0.34 \mathrm{~V} ; E_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{\circ}=-0.76 \mathrm{~V}\right)\)AP EAMCET 2012 Easy