Trig
is an option for various polynomial manipulation functions that specifies whether trigonometric functions should be treated like polynomial elements.
Examples
Wolfram Research (1991), Trig, Wolfram Language function, https://reference.wolfram.com/language/ref/Trig.html.
Text
Wolfram Research (1991), Trig, Wolfram Language function, https://reference.wolfram.com/language/ref/Trig.html.
CMS
Wolfram Language. 1991. "Trig." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/Trig.html.
APA
Wolfram Language. (1991). Trig. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Trig.html