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Trigonometric computations in mathematical educational software

M.S. Lvov
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Development of algorithms of algebraic computations is one of basic tasks, which arise up during the realization of the mathematical systems, based on symbol transformations. The algorithms of trigonometric computations, based on the construction of canonical forms of trigonometric expressions which are used, in particular, at programming of standard tasks of trigonometry school course: simplifications of expression, proving of identity, solving of equation and inequality are considered in the work.
Keywords: Mathematical systems of educational purpose, methods of computer algebra, symbol transformations, trigonometry