math
Thursday, October 20, 2016
Тригонометр хялбар тэгшитгэл бодох
http://next4.blogspot.com/2012/02/blog-post_4404.html
Тригонометр үндсэн адилтгал
http://documents.tips/documents/-1559855131a28abc6058b46d4.html
Тригонометрийн бодлогууд
http://gulden2012.blogspot.com/2012/08/blog-post_9062.html
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