thanks a lot for sharing these links. Specially this one- http://fermatslasttheorem.blogspot.com/2005/08/another-false-proof-russian-professor.html http://ferma

thanks a lot for sharing these links. Specially this one- http://fermatslasttheorem.blogspot.com/2005/08/another-false-proof-russian-professor.html http://fermatslasttheorem.blogspot.com/2005/08/another-false... I understand, I need to prove that- cos θ is irrational for all θ, where 60<θ<90. Which is not actually true.