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Question:
Question 5: 2 tan 30degrees/(1 - tan2 30degrees) is equal to
Answer:

Given,

   2*tan 30° /(1 - tan2 30° )

= tan (2*30° )                     {since tan 2θ = 2*tan θ/(1 - tan2 θ) }

= tan 60°

= √3

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