Practicing Success
Practicing Success
CUET Preparation Today
If $A=\left[\begin{array}{cc}\sin \alpha & -\cos \alpha \\ \cos \alpha & \sin \alpha\end{array}\right]$, and $A+A'=I$, then the value of '$\alpha$' is: |
$\frac{\pi}{4}$ $\frac{\pi}{3}$ $\frac{\pi}{6}$ $\frac{\pi}{2}$ |
$\frac{\pi}{6}$ |
The correct answer is Option (3) → $\frac{\pi}{6}$ |
