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Mathematics, 18.12.2019 22:31 malikfitzgerald7392

Triunghiul isoscel abc are latura [bc] situata intr un plan alfa si se proietcteaza pe plan dupa triunghiul dreptunghic dbc. stiinda ca m(bdc)=90°, iar bd=16 cm si cd=12 cm, aflati

a) cosinusul unghiului abc

b) lungimea laturii [bc] a triunghiului abc

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