Corbett Higher Plus question | Revision Server | Page 1

surreal oxide Apr 16, 2023, 11:36 AM

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No idea how to do this one, the "-2xy cos75 ", what is he doing there? other than that its just basic pythag, right?

iron kraken Apr 16, 2023, 11:41 AM

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They’re using cos rule

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Since you don’t know if angle BEC is 90°

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Actually you know it’s not 90° lmao

surreal oxide Apr 16, 2023, 11:42 AM

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yea

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its 75

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so if i jus watch a vid of cosine rule i should be good?

iron kraken Apr 16, 2023, 11:42 AM

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I’d presume so

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