Cheatography
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Laws of indices and surds
Angles of elevation and depression
Probability
Experimental probability |
= The frequency of the outcome / total number of trials |
Relative frequancy |
frequency of the outcome / total number of trials |
Financial maths
Dividing annual salary |
Weekly = 52 | Fortnightly = 26 | Monthly = 12 |
Calculating percentage of $ |
0.% * $ | EG. 12% of 150 = 0.12 X 150 |
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Algebra
Coefficient |
The number in front | 5y, y's coefficient is 5 |
Terms |
A term is separated by a + or - sign | 5x-3y+2 there are 3 terms there |
Constant |
Constant is the single number which doesn't have any letters behind it |
Linear and Non-linear graphs
Gradient |
Gradient = M | M=Rise divided by run |
Gradient through two points |
M = y2 - y1 / x2 - x1 |
Gradient intercept method |
Y=mx + c | Find gradient + x and y intercept |
x and y intercept method |
To solve X, Y = 0 | To solve Y, X = 0, Then plot the x and y intercepts |
Intercepts |
Y = C | X = A |
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Measurement
TSA |
Area of all sides added up |
Volume |
Area X Height |
SA of cylinder |
SA = 2πr² + 2πrh |
SA of sphere and volume |
A=4πr² | V=4/3πr³ (volume) |
TSA of Cone |
πrl+πr² |
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