MCQ
$\left|\begin{array}{cc}\sin 23^{\circ} & -\sin 7^{\circ} \\ \cos 23^{\circ} & \cos 7^{\circ}\end{array}\right|=$
- A$\frac{\sqrt{3}}{2}$
- ✓$\frac{1}{2}$
- C$\sin 16^{\circ}$
- D$\cos 16^{\circ}$
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