1

We are asked to prove $$\tan{\frac{3\pi}{11}} +4\sin{\frac{2\pi}{11}}=\sqrt{11}$$

So far the solution that I have come across all use complex numbers to get to the result

I am searching for a solution which uses basic trig identities to prove the result

sidt36
  • 261
  • 3
    http://math.stackexchange.com/questions/1804283/prove-that-tan-left-frac3-pi11-right4-sin-left-frac2-pi11-right – lab bhattacharjee Jun 25 '16 at 04:53
  • 1
    I have seen that post.However I am searching for a solution which does not use complex numbers – sidt36 Jun 25 '16 at 04:55
  • Trigonometry is not complete without complex numbers. – Kenny Lau Jun 25 '16 at 05:06
  • Your right it isn't. I found this problem in a pure trigonometric identities chapter of my study material and i have not completed complex number as yet .So I am hoping that there is a solution without complex numbers – sidt36 Jun 25 '16 at 05:08

0 Answers0