Two adjacent sides of a triangle are represented by the vectors `vec(a)=3hat(i)+4hat(j) and vec(b)=
Channel: Doubtnut
Date: 29/12/2019

Two adjacent sides of a triangle are represented by the vectors `vec(a)=3hat(i)+4hat(j) and vec(b)=-5hat(i)+7hat(j)`. The area of the triangle is