Pythagorean Theorem - The Cosine Formula

Applies 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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  1. 16mm Filmography (legacy record) — title, year, creator, format, sound, description, catalog record