Nystedt, Patrik (2017년 6월). “A Proof of the Law of Sines Using the Law of Cosines”. 《Mathematics Magazine》 (Taylor & Francis, Ltd.) 90 (3): 180-181. doi:10.4169/math.mag.90.3.180. ISSN0025-570X. MR3654857.
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Nystedt, Patrik (2017년 6월). “A Proof of the Law of Sines Using the Law of Cosines”. 《Mathematics Magazine》 (Taylor & Francis, Ltd.) 90 (3): 180-181. doi:10.4169/math.mag.90.3.180. ISSN0025-570X. MR3654857.
Nystedt, Patrik (2017년 6월). “A Proof of the Law of Sines Using the Law of Cosines”. 《Mathematics Magazine》 (Taylor & Francis, Ltd.) 90 (3): 180-181. doi:10.4169/math.mag.90.3.180. ISSN0025-570X. MR3654857.