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Two tangents are drawn from a point (-2 ,-1) to the curve , $\;y^{2}=4x\;$ . If $\;\alpha\;$ is the angle between them , then $\;|tan \alpha|\;$ is equal to :

$(a)\;\large\frac{1}{3} \qquad(b)\;\large\frac{1}{\sqrt{3}}\qquad(c)\;\normalsize \sqrt{3}\qquad(d)\;\normalsize 3$

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