1.

If veca = 3hati+hatj-2hatk, vecb = 2hati-3hatj+4hatk then verify that vecaxxvecb is perpendicular to both veca and vecb.

Answer»

Solution :
Now `(vecaxxvecb).VECA`
= `(10hati-8hatj-11hatk).)3hati+hatj+2hatk)`
=30-8-22 = 0
Again `(vecaxxvecb).VECB`
= `(10hati-8hatj-11hatk).(2hati-3hatj+4hatk)`
= 20+24-44 = 0
HENCE `vecaxxvecb` is PERPENDICULAR to both `veca` and `vecb`.(PROVED).


Discussion

No Comment Found

Related InterviewSolutions