2.1: The Law of Sines - Mathematics LibreTexts
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Web ResultNov 17, 2022 · Another way of stating the Law of Sines is: The sides of a triangle are proportional to the sines of their opposite angles. Proof. To prove the Law of Sines, let \ (\triangle\,ABC \) be an oblique triangle. Then \ (\angle \,ABC \) can be acute, as in Figure \ (\PageIndex {1}\) (a), or it can be obtuse, as in Figure \ (\PageIndex …
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