from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A function of an angle expressed as the ratio of two of the sides of a right triangle that contains that angle; the sine, cosine, tangent, cotangent, secant, or cosecant.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun trigonometry Any function of an
angleexpressed as the ratioof twoof the sidesof a right trianglethat has that angle, or various other functions that subtract 1 from this value or subtract this value from 1 (such as the versed sine)
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle
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