Find the area of the trinagle whose two adjacent sides are determined by the vectors   (i) `vec(a)=
Channel: Doubtnut
Date: 19/04/2020

Find the area of the trinagle whose two adjacent sides are determined by the vectors   (i) `vec(a)= -2hat(i)-5 hat(k)`and `vec(b)=hat(i)- 2 hat(j)- hat(k)`    (ii) `vec(a)= 3 hat(i)+ 4 hat(j)` and `vec(b)=-5hat(i)+7 hat(j).`