Trigonometry; cosine and sine; addition formulae

MLA

Patrick D. Barry. Trigonometry; Cosine and Sine; Addition Formulae. Jan. 2016. EBSCOhost, https://doi.org/10.1016/b978-0-12-805066-8.50009-4.

APA

Patrick D. Barry. (2016). Trigonometry; cosine and sine; addition formulae. https://doi.org/10.1016/b978-0-12-805066-8.50009-4

Chicago

Patrick D. Barry. 2016. “Trigonometry; Cosine and Sine; Addition Formulae,” January. doi:10.1016/b978-0-12-805066-8.50009-4.