Maths Equations

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When do you use the Sine Rule?
We use it whenever we have opposite in a non right angle triangle.
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What is the equation for the sine rule?
a/Sin(A) = b/Sin(B)
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When do we use the cosine rule?
When we don't have the opposite of a non right angled triangle.
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What is the equation for the cosine rule?
a'2 = b'2 + c'2 - 2bc cosA
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What is the equations for the cosine rule when you want to find an angle?
cosA = b'2 +c'2 - a'2 / 2bc
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Area of a triangle equation
0.5 x ab x sinC
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Equation for compound growth and decay
N = No (original amount) x (1 + percentage change/100)'no. days etc
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Area of a trapezium
1/2 x (a+b) x h
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Quadratic equation (rearranged)
ax'2 + bx + c = 0
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Quadratic equation
x = -b +- >b'2 - 4ac / 2a
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Pythagorous
a'2 + b'2 = c'2
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Whats on top Distance, Speed and Time ?
Distance
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Whats on top Mass, Volume or Density?
Mass
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Whats on top Force, Acceleration or pressure?
Force
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Volume of a cuboid
L x W x H
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Volume of a prism
Area of cs x L
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Volume of a pyramid
1/3 x base area x h
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Volume of a cone
1/3 x (pi r squared) x h
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Volume of a sphere
4/3 x (pi r cubed)
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Gradient
rise over run
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Probability equation if events A and B are mutually exclusive
P(A or B) = P(A) + P(B)
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Probability equation if events A and B are independent
P(A and B) = P(A) x P(B)
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%Change equation
Change/original x 100
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%Profit equation
Profit/orignal x 100
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Sector equation
@/360 x area of circle
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Exterior angles equation
360 / number of sides. Exterior angles add up to 360
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Directly Proportional
y = kx
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Inversely Proportional
y = k/x
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Other cards in this set

Card 2

Front

What is the equation for the sine rule?

Back

a/Sin(A) = b/Sin(B)

Card 3

Front

When do we use the cosine rule?

Back

Preview of the front of card 3

Card 4

Front

What is the equation for the cosine rule?

Back

Preview of the front of card 4

Card 5

Front

What is the equations for the cosine rule when you want to find an angle?

Back

Preview of the front of card 5
View more cards

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