Question:medium

Choose the correct option and justify your choice: \(\frac{2\ tan\ 30°}{1 - tan^2 30°} =\)

Updated On: Jan 13, 2026
  • cos 60° 

  • sin 60°

  • tan 60° 

  • sin 30°

Show Solution

The Correct Option is C

Solution and Explanation

\(\frac{2\ tan\ 30°}{1 - tan^2 30°}\)

\(=\frac{ 2 × \left(\frac{1}{\sqrt3}\right) }{ 1 - \left(\frac{1}{\sqrt3}\right)^2}\)

\(= \frac{\left(\frac{2}{\sqrt3}\right) }{ \left(1 - \frac{1}{3}\right)}\)

\(= \frac{\left(\frac{2}{\sqrt3}\right) }{ \left(\frac{2}{3}\right)}\)

\(= \sqrt3\)
The expression equals \( \sqrt3 \). Among the given options, only tan 60° equals \( \sqrt3 \).

Therefore, option (C) is correct.

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