Pythagorean Theorem - The Cosine Formula
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✎ Suggest a correctionApplies the Pythagorean theorem to acute angled triangles, and describes the cosine formula. Uses animated drawings to show that as the acute angle nears a right angle, its cosine approaches zero, so that the Pythagorean theorem reappears.
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- A-V Online (National Information Center for Educational Media). CD-ROM database of educational and documentary media, compiled and maintained by the National Information Center for Educational Media (NICEM). — title, year, creator, length, format, sound, description
- 16mm Filmography (legacy record) — creator, catalog record
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