If $\sqrt{3}tan\theta$ = $3 sin\theta$, then the value of $( sin^{2}\theta - cos^{2}\theta)$ is

If $\sqrt{3}tan\theta$ = $3 sin\theta$, then the value of $( sin^{2}\theta - cos^{2}\theta)$ is
1). 1
2). 3
3). $\frac{1}{3}$
4). None

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