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reduction formula
noun
1.
(
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 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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reduction
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