An identity related to Jordan's inequality.
Li, Jian-Lin
International Journal of Mathematics and Mathematical Sciences, Tome 2006 (2006), / Harvested from The Electronic Library of Mathematics
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Publié le : 2006-01-01
DOI : https://doi.org/10.1155/IJMMS/2006/76782
EUDML-ID : urn:eudml:doc:54421 
@article{05188486,
     title = {An identity related to Jordan's inequality.},
     journal = {International Journal of Mathematics and Mathematical Sciences},
     volume = {2006},
     year = {2006},
     doi = {10.1155/IJMMS/2006/76782},
     zbl = {1143.26010},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05188486}
}

Li, Jian-Lin. An identity related to Jordan's inequality.. International Journal of Mathematics and Mathematical Sciences, Tome 2006 (2006) . doi : 10.1155/IJMMS/2006/76782. http://gdmltest.u-ga.fr/item/05188486/