Question

If i, j ,k are the three rectangular unit vectir then which of the following relation is true (a)i×i =0 (b) i×j=0 (c) i×k=0 (d)i×j×k=0​

Answer 1

$\large{\boxed{\underline{\purple{ANSWER}}}}$

When cross product of any vector is done we multiply the magnitude of respective vectors with sine of angle between them .

So, If the angle between them is 0° , then the answer of the cross product will be 0.

Hence, correct option is (a) i × i = 0.