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Program Details

Part of the series: Project Mathematics! Series
Producer: California Institute of Technology
Year produced: 1993
Total length: 30 minutes
Grade(s): 9-12


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Focuses on the use of sines and cosines in trigonometry, with special emphasis on the law of cosines and the law of sines. They enable us to find all parts of a triangle if three parts are known and at least one of them is a side. Applications are described in astronomy, navigation, and surveying by triangulation. One of the major triumphs of surveying by triangulation is the survey of India, which took more than a century to complete. The program describes how the survey was done and how the height of Mount Everest was determined. The program also outlines a brief history of surveying instruments, from the dioptra of ancient times to orbiting satellites of modern times.



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