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Area of parallelogram
A = bh
Area of trapezium
A = ((a+b)/2) x h
Cirumference of circle
C = 2πr
Area of circle
A = πr²
Volume of prism
V = area of cross section x h
Pythagoras' theorem
a² = b² + c²
sinx =
opp/hyp
cosx
adj/hyp
tanx
opp/adj
Sine rule
a/sinA = b/sinB = c/sinC
Cosine rule
a² = b² + c² - 2bc cosA
Area of triangle (trigonometric)
A = ½ab sinC
Quadratic formula
x=(-b±√(b²-4ac))/2a
Compound interest
Total = P(1 + r/100)ⁿ
Note
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