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Reported Question / Answer
Q.) cos2α =
1)
1+ tan<sup>2</sup>α/1 - tan<sup>2</sup>
2)
2tanα/1 - tan<sup>2</sup>
3)
1- tan<sup>2</sup>α/1 + tan<sup>2</sup>
4)
None of the Above
5)
NULL
Answer :
3
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Human Verification : Answer 2 + 3 = ?
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