cosine/sine Flashcards by lia gallagher | Brainscape

Q

cosine formulas

A

a2=b2+c2-2bcCosA
b2+c2-a2
2bc

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Q

sine formula

A

a b c
sinA sinB SinC

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Q

How do you know if its a sine rule?

A

x2 angles, x1 side
x2 sides, non-included angle

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Q

How do you know if its a cosine rule?

A

x3 sides
x2 sides, x1 angle

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Q

What angle will east be

A

90

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