Mathematics – History and Overview
Scientific paper
2009-09-28
Mathematics
History and Overview
3 pages
Scientific paper
We give two proofs of the identity $$\sqrt{\frac{\cos\frac{2\pi}{5}}
{\cos\frac{\pi}{5}}}+\sqrt{\frac{\cos\frac{\pi}{5}} {\cos\frac{2\pi}{5}}
}=\sqrt{5},$$ using and not using the gold ratio.
Shevelev Vladimir
No associations
LandOfFree
Gold ratio and a trigonometric identity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Gold ratio and a trigonometric identity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gold ratio and a trigonometric identity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-234884