How I can generate sin wave ?​

 

A sinewave generator!

http://www.national.com/nationaledge/jun04/article.html

 

What are you using it for? These sites have numerous sine wave generators. You didn't mention what application it was being used for, so I have to be vague.
http://www.edn.com/search/SiteDesignIdeas?q=sine+wave

http://www.discovercircuits.com/O/o-sine.htm

 

Voltage and purity are also important, as well as the load they will feed.

Do you want it to be variable?

TI has a pretty good abstract paper on sine wave generators.

Sine Wave Oscillators