1.

If $cos^{4}\theta - sin^{4}\theta$= $\frac{2}{3}$, then the value of $1 - 2 sin^{2}\theta$ is1). $\frac{2}{3}$2). $\frac{3}{2}$3). 14). 0

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This question was asked some where in previous year PAPERS of SSC, and CORRECT ANSWER was OPTION 1



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