SOLUTION: Rewrite (2tan 23°) / (1 - tan223° ) as a single function of an angle. See

Question 1205943: Rewrite (2tan 23°) / (1 - tan223° ) as a single function of an angle. See

Answer by ikleyn(53937) (Show Source): You can put this solution on YOUR website!
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Rewrite (2tan(23°)) / (1 - tan^2(23°)) as a single function of an angle.
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What is written in the post, is  (2tan(23°)) / (1 - tan^2(23°)),  or  .

Use the formula/identity  tan(2a) = .


In your case, angle "a" is  a = 23°.  So, according to the formula,

     = tan(2*23°) = tan(46°).


It is what you want to get.


ANSWER.  (2tan(23°)) / (1 - tan^2(23°)) = tan(46°).

Solved.

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