Hello! This is my first post on this wonderful forum, and I hope one of many more to come.
Here is the first question to be posed:
Prove, in as elegant a manner as possible, that
\[\sin x = 2^n \cdot \cos \frac {x}{2} \cdot \cos \frac{x}{x^2} \cdot \cdot \cdot \cos \frac {x}{2^n} \cdot \sin \frac{x}{2^n} \].
Trigonometric Proof
- zadid xcalibured
- Posts:217
- Joined:Thu Oct 27, 2011 11:04 am
- Location:mymensingh
Re: Trigonometric Proof
Repeated use of the identity $Sin(2x)=2sin(x).cos(x)$
There can be no more elegant proof.
There can be no more elegant proof.