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Summary
DescriptionLaw of cosines in plane trigonometry.svg
Euskara: Trigonometria lauaren kosinuen legea frogatzeko irudia. Bakarrik frogatzen da hiru berdintzen bat; beste biak modu berean frogatzen dira, hirukiaren oinarri bezala beste alde biak hartuta.
English: Image to demonstrate the law of cosines of plane trigonometry. Only one of the three equalities is shown; the other two are proved in the same way, taking the other two sides of the triangle as its base.
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