defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Determinants Evaluation of Determinants
If a, b, c are the sides of triangle ABC then what is
\(\left|\begin{array}{ccc} a^2 & b \sin A & c \sin A \\ b \sin A & 1 & \cos A \\ c \sin A & \cos A & 1 \end{array}\right|\)
equal to ?
1
Zero
2
Area of triangle
3
Perimeter of triangle
4
a2 + b2 + c2