Question

The value of the determinant $\begin{vmatrix}cos^2θ&cosθsinθ&0 \\\\-sinθ&cosθ&0 \\\ 0&0&1 \end{vmatrix}$ is equal to

• A. 1
• B. cos θ
• C. cos 2θ
• D. cos θ-sin θ

Answer 1

Answer: (B)

cos θ

Answer 2

The correct option is(B):cos θ