Coordinate Geometry Flashcards by Leoni Brady

Q

cosine rule

A

a^2 = b^2 + c^2 - 2bc cosA

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Q

sine rule

A

sinA/a = sinB/b = sinC/c

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Q

area of a traingle

A

1/2 absinC

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Q

arc length

A

r@
must be in radians

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Q

sector area

A

1/2 r^2 @
must be in radians

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Q

segment area

A

1/2 r^2 (@-sin@)
must be in the radians

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