trig rules Flashcards by Annie Rose | Brainscape

Q

sine rule

A

a/sinA = b/sinB = c/sinC

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Q

cosine rule for angles

A

cosA = (b^2+c^2-a^2)/2bc

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Q

cosine rule for lengths

A

a^2 = b^2 + c^2 -2bccosA

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Q

area of a triangle

A

1/2 x a x b x sinC

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