{"id":"site-2654/zad/5777","paper_id":"site-2654","number":"5777","points":null,"ptype":"open","subject":"matematyka","category":"zbiory","year":0,"month":null,"level":"podstawowa","text":"Rozwiązanie zadania. Kąt α jest ostry oraz sinα = 2√5/5. Wtedy A. cosα = 5/2√5 B. cosα = √5/5 C. cosα = 1/5 D. α = 4/5.","answer":null,"answer_text":null,"solution":null,"image":"img/site/2654/zad-5777.svg","solution_image":"img/site/2654/rozw-5777.svg","topics":null,"page_from":null,"source":"site","answer_source":null,"answer_text_source":null,"solution_source":null,"text_source":"site","source_label":"Matematyka · Zbiory zadań (podstawowa)","subject_label":"Matematyka","category_label":"Zbiory zadań","text_html":"<p>Rozwiązanie zadania. Kąt α jest ostry oraz sinα = 2√5/5. Wtedy A. cosα = 5/2√5 B. cosα = √5/5 C. cosα = 1/5 D. α = 4/5.</p>","solutions":[{"source":"site","label":"matematykaszkolna.pl","kind":"image","image":"/img/site/2654/rozw-5777.svg"}]}