Geometry/Trigonometry | Mathematics | Page 1

dusky jolt Feb 1, 2024, 12:24 AM

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How do I prove |AC| is equal to 2rcosa
(a being alpha the angle measured in radians). I believe it requires a theorem? Help is appreciated.

summer voidBOT Feb 1, 2024, 12:24 AM

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boreal nimbus Feb 1, 2024, 12:27 AM

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Abc is right triangle

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The claim follows

boreal nimbus Feb 1, 2024, 12:27 AM

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Tales' theorem

dusky jolt Feb 1, 2024, 12:54 AM

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Can I use the law of cosines on it?

#Geometry/Trigonometry