Question:
Mark $(\sqrt{)}$ against the correct answer in each of the following:
Two adjacent sides of a triangle are represented by the vectors $\overrightarrow{\mathrm{a}}=3 \hat{\mathrm{i}}+4 \hat{\mathrm{j}}$ and $\overrightarrow{\mathrm{b}}=-5 \hat{\mathrm{i}}+7 \hat{\mathrm{j}}$ The area of the triangle is
A. 41 sq units
B. 37 sq units
C. $\frac{41}{2}$ sq units
D. none of these
Solution:
