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From Longman Dictionary of Contemporary English
Related topics: Maths
trigonometrytrig‧o‧nom‧e‧try /ˌtrɪɡəˈnɒmətri $ -ˈnɑː-/ noun [uncountable]  HMthe part of mathematics concerned with the relationship between the angles and sides of triangles
Examples from the Corpus
trigonometryI can see how physics, algebra, trigonometry relate to the machine shop.He hoped to be an engineer, and he was taking algebra and trigonometry and falling behind in both.I had a very strong background in physics, chemistry, trigonometry and geometry.By itself, it is easy to interpret this ability as some sort of mindless, automatic exercise in trigonometry.An early form of analogue computer, the astrolabe was primarily designed to solve problems of spherical trigonometry to shorten astronomical calculations.I have seen people here who never took trigonometry in high schools' he said with something like awe.
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