MCQ
જો $f(\theta)=\left[\begin{array}{ll}\cos \theta & -\sin \theta \\ \sin \theta & -\cos \theta\end{array}\right]$ હોય, તો $f\left(\frac{\pi}{6}\right)=$ ________.
- ✓$-\frac{1}{2}$
- B$\frac{1}{2}$
- C$\frac{\sqrt{3}}{2}$
- D$-\frac{\sqrt{3}}{2}$
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