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Tana = ( √(3) - 1) / ( √(3) + 1)show \: that \: cosa = ( √(3) + 1) / 2 √(2) ​

Tana = ( √(3) - 1) / ( √(3) + 1)show \: that \: cosa = ( √(3) + 1) / 2 √(2) ​
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tana = ( √(3) - 1) / ( √(3) + 1)show \: that \: cosa = ( √(3) + 1) / 2 √(2)

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User Avyaan
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what exactly am i supposed to do?
User Billzhong
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