reference angle

noun

An acute angle with the same values of trigonometric functions, up to sign, as another angle: used for easy reference when examining the non-acute angle.

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Meanings

nounreference angle (plural reference angles)

plural reference angles

  1. An acute angle with the same values of trigonometric functions, up to sign, as another angle: used for easy reference when examining the non-acute angle.
Cite this entry
APA

reference angle. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/reference%20angle

MLA

“reference angle.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/reference%20angle. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “reference angle,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/reference%20angle.

Source: reference angle on Wiktionary, CC BY-SA 4.0.