If $\operatorname{cosec} \theta = \frac{2}{\sqrt{3}}$,then $\theta = \ldots$ (in $^\circ$)
- A$30$
- B$45$
- C$60$
- D$90$
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| $2. \tan \theta$ | $b. \frac{1}{\csc \theta}$ |
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| $e. \sin \theta \cdot \cos \theta$ |
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