{"id":"site-3917/zad/3925","paper_id":"site-3917","number":"3925","points":null,"ptype":"open","subject":"matematyka","category":"zbiory","year":2013,"month":null,"level":"rozszerzona","text":"Wykaż, że dla dowolnego kąta α prawdziwa jest tożsamość sin^4 α + cos^4 α = 1 + cos^2 2α / 2.","answer":null,"answer_text":null,"solution":null,"image":"img/site/3917/zad-3925.svg","solution_image":"img/site/3917/rozw-3925.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 · 2013 (rozszerzona)","subject_label":"Matematyka","category_label":"Zbiory zadań","text_html":"<p>Wykaż, że dla dowolnego kąta α prawdziwa jest tożsamość sin^4 α + cos^4 α = 1 + cos^2 2α / 2.</p>","solutions":[{"source":"site","label":"matematykaszkolna.pl","kind":"image","image":"/img/site/3917/rozw-3925.svg"}]}