Gcse basic formulas Flashcards by Amisha Patel

Q

quadratic formula ?

A

x = (-b ± √(b² - 4ac)) / (2a)

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Q

cosine rule?

A

a ² = b ² + c ² - 2bcxcosA

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Q

sine rule ?

A

a/sinA = b/sinB = c/sinC

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Q

Area of a non right angled triangle?

A

A = 1/2absinC

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