Math Formulas, Practice, Tests, Forums, Free Help

$\lim_{x \to 0}\frac{1-cosx*cos2x*cos3x*...*cosnx}{\sum_{k=1}^{n }sinkx^{2}}$

Math problem of the week

Website Info

The website was created in September 2005.
It is visited by 14,000 - 23,000 people daily, mostly from USA, Bulgaria and Russia.
In 2011 was created a Russian version, and in 2015 Serbian.

Contact email:

Copyright © 2005-2017.