Maths Equations 5.0 / 5 based on 2 ratings ? MathematicsAll essential equationsGCSEEdexcel Created by: xxeli123xxCreated on: 05-11-16 14:30 When do you use the Sine Rule? We use it whenever we have opposite in a non right angle triangle. 1 of 28 What is the equation for the sine rule? a/Sin(A) = b/Sin(B) 2 of 28 When do we use the cosine rule? When we don't have the opposite of a non right angled triangle. 3 of 28 What is the equation for the cosine rule? a'2 = b'2 + c'2 - 2bc cosA 4 of 28 What is the equations for the cosine rule when you want to find an angle? cosA = b'2 +c'2 - a'2 / 2bc 5 of 28 Area of a triangle equation 0.5 x ab x sinC 6 of 28 Equation for compound growth and decay N = No (original amount) x (1 + percentage change/100)'no. days etc 7 of 28 Area of a trapezium 1/2 x (a+b) x h 8 of 28 Quadratic equation (rearranged) ax'2 + bx + c = 0 9 of 28 Quadratic equation x = -b +- >b'2 - 4ac / 2a 10 of 28 Pythagorous a'2 + b'2 = c'2 11 of 28 Whats on top Distance, Speed and Time ? Distance 12 of 28 Whats on top Mass, Volume or Density? Mass 13 of 28 Whats on top Force, Acceleration or pressure? Force 14 of 28 Volume of a cuboid L x W x H 15 of 28 Volume of a prism Area of cs x L 16 of 28 Volume of a pyramid 1/3 x base area x h 17 of 28 Volume of a cone 1/3 x (pi r squared) x h 18 of 28 Volume of a sphere 4/3 x (pi r cubed) 19 of 28 Gradient rise over run 20 of 28 Probability equation if events A and B are mutually exclusive P(A or B) = P(A) + P(B) 21 of 28 Probability equation if events A and B are independent P(A and B) = P(A) x P(B) 22 of 28 %Change equation Change/original x 100 23 of 28 %Profit equation Profit/orignal x 100 24 of 28 Sector equation @/360 x area of circle 25 of 28 Exterior angles equation 360 / number of sides. Exterior angles add up to 360 26 of 28 Directly Proportional y = kx 27 of 28 Inversely Proportional y = k/x 28 of 28
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