9. trigonometric ratios Flashcards by nour m

Q

sine rule for two solutions for a missing angle
sine theta=

A

sin(180-theta)

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Q

area of a triangle

A

1/2absinc

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Q

cosine rule

A

a2 = b2 + c2 - 2bc cos a

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Q

cos a =

A

b2 + c2 - a2 / 2bc

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