Question

For any two vectors of a and b of magnitudes 3 and 4 respectively, write the value of [a b a x b] + (a.b)².

Answer 1

the dot and cross can be interchanged in scalar triple product.

Let the angle between  \(\vec a\) and  \(\vec b\) vector be \(\theta\)

=144 sin² θ+144 cos² θ

=144(1)

=144