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World English Dictionary

reduction formula | |

—n | |

maths a formula, such as sin (90° ± A) = cos A, expressing the values of a trigonometric function of any angle greater than 90° in terms of a function of an acute angle |

Collins English Dictionary - Complete & Unabridged 10th Edition

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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins

Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009

Cite This Source

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