Image: Trigonometric function quadrant sign

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Description: Signs of trigonometric functions in each quadrant. The mnemonic "All Science Teachers (are) Crazy is from https://books.google.com/books?id=ZZoxLiJBwOUC&pg=PA228 .
Title: Trigonometric function quadrant sign
Credit: Own work
Author: Cmglee
Permission: Public domainPublic domainfalsefalse This chart is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship. For more information, see Commons:Threshold of originality § Charts العربية | Deutsch | English | español | français | italiano | 日本語 | македонски | română | русский | slovenščina | 中文（简体） | 中文（繁體） | +/−
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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Trigonometric functions

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