COLECCION DE PROBLEMAS DE TRIGONOMETRIA GRADO 8-9 -AUTOR N.A.RYBKIN - 1933- Сборник задач по тригонометрии Por Н. А. Рыбкин

LINK ORIGINAL EN LA WEB FORMATO DJVU
http://mexalib.com/download/58467
LINK ALTERNATIVO EN  PDF
http://www.mediafire.com/view/lzrk0oaj4l85jw3/Collection_of_trigonometry_problems._8-9_years_of_study.pdf

LINK GOOGLE DEMO BOOK VERSION RUSSO
Сборник задач по тригонометрии
 Por Н. А. Рыбки
https://books.google.com.br/books?id=1kv-AgAAQBAJ&lpg=PA1&ots=SRdsj_rIdM&dq=%D0%A1%D0%B1%D0%BE%D1%80%D0%BD%D0%B8%D0%BA%20%D0%B7%D0%B0%D0%B4%D0%B0%D1%87%20%D0%BF%D0%BE%20%D1%82%D1%80%D0%B8%D0%B3%D0%BE%D0%BD%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D0%B8%20%D0%B4%D0%BB%D1%8F%20%D1%81%D1%80%D0%B5%D0%B4%D0%BD%D0%B5%D0%B9%20%D1%88%D0%BA%D0%BE%D0%BB%D1%8B.%208-9%20%D0%B3%D0%BE%D0%B4%D1%8B%20%D0%BE%D0%B1%D1%83%D1%87%D0%B5%D0%BD%D0%B8%D1%8F%20%D0%A0%D1%8B%D0%B1%D0%BA%D0%B8%D0%BD%20%D0%9D.%D0%90.&hl=pt-BR&pg=PP1#v=onepage&q&f=false