Math's Equations 0.0 / 5 ? MathematicsFormulasGCSEAQA Created by: ameliegraceCreated on: 25-11-18 18:31 The quadratic formula x = -b±√b²-4ac ÷ 2a 1 of 15 Circumference of a circle 2πr or πd 2 of 15 Area of a circle πr² 3 of 15 Pythagoras' theorem a²+b²=c² 4 of 15 Trigonometry (SOHCAHTOA) sinθ = opposite ÷ hypotenuse cosθ = adjacent ÷ hypotenuse tanθ = opposite ÷ adjacent 5 of 15 Sine rule a ÷ sinA = b ÷ sinB = c ÷ sinC 6 of 15 Cosine rule a² = b² + c² - 2bc cosA 7 of 15 Area (trigonometry) ½ab sinC 8 of 15 Area of trapezium ½(a+b)h 9 of 15 Volume of a prism area of cross section x length 10 of 15 Compound interest total = initial amount( 1 + r÷100 )ⁿ 11 of 15 Probability P(A or B) = P(A) + P(B) - P(A and B) P(A and B) = P(A given B)P(B) 12 of 15 Speed distance ÷ time 13 of 15 Density mass ÷ volume 14 of 15 Pressure force ÷ area 15 of 15
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