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If $\text{cosec } \theta = \sqrt{10}$, then the value of $\text{sec } \theta$ is :
- (a)$\frac{3}{\sqrt{10}}$
- (b)$\frac{\sqrt{10}}{3}$
- (c)$\frac{1}{\sqrt{10}}$
- (d)$\frac{2}{\sqrt{10}}$
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Sol. (B) $\frac{\sqrt{10}}{3}$