Which of the following is not true ? If $\overrightarrow A = 3\hat i + 4\hat j$ and $\overrightarrow B = 6\hat i + 8\hat j$ where $ A$ and $B$ are the magnitudes of $\overrightarrow A $ and $\overrightarrow B $
$\overrightarrow A \times \overrightarrow B = 0$
$\frac{A}{B} = \frac{1}{4}$
$\overrightarrow {A\,.} \,\overrightarrow B = 50$
$A = 5$
Obtain scalar product in terms of Cartesian component of vectors.
If $|\vec A \times \vec B| = \sqrt 3 \vec A.\vec B,$ then the value of$|\vec A + \vec B|$ is
Show that the scalar product of two vectors obeys the law of commutative.