| 摘要 |
<p>Apparatus for developing fast sine and cosine functions via a division of the angle whose trigonometric function is to be developed into a plurality of component angles. Sine and cosine values of the component angles are obtained from look-up tables (10, 11, 12, 13, 14, 15) and appropriately combined (30). High computational speed is obtained by creating the plurality of component angles based on the radix used in the digital representation of the angle and, furthermore, by creating the component angles so that the look-up tables are approximately equal in size.</p> |
