Question

Plz answer this question plz.........

Answer 1

We haved1→=3iˆ+jˆ−2kˆd2→=iˆ−3jˆ+4kˆWe know thatLength of sides are ∣∣d1−→+d2−→∣∣2 and ∣∣d1−→−d2−→∣∣2 ∣∣d1−→+d2−→∣∣2=∣∣3iˆ+jˆ−2kˆ+iˆ−3jˆ+4kˆ∣∣2=∣∣4iˆ−2jˆ+2kˆ∣∣2=16+4+4√2=24√2=26√2=6√ ∣∣d1−→−d2−→∣∣2=∣∣3iˆ+jˆ−2kˆ−iˆ+3jˆ−4kˆ∣∣2=∣∣2iˆ+4jˆ−6kˆ∣∣2=4+16+36√2=56√2=214√2=14