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38 Cards in this Set
- Front
- Back
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sin =
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opp
------ hyp |
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cos =
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adj
----- hyp |
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tan =
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opp
------ adj |
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Fractional indices
= 25 to the power of 1/2 = |
Fractional indices
= Square root of 25 |
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Fractional indices
= 56 to the power of 2/3 = |
Fractional indices
= (cubed root of 56)to the power of 2 |
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Rationalise
1 ----- root 5 |
1 root 5
---- X ------- root 5 root 5 |
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sum of interior angles =
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(num of sides - 2) X 180
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what is a bisector?
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a bisector divides a line or an angle into two equal parts
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What should you always do with an angle bisector?
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Set the compass point after the hallway point
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what is a locus?
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a locus is the movement of a point according to a given rule
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how would this be expanded?
(X+1)(X+2) |
X^2 + 2X + X + 2
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how would this be expanded
(X+5)(X÷2) |
X^2 - 2X + 5X - 10
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what is factorising?
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the opposite of expanding brackets
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Factorising - What provides the factors in this equation?
X^2 + 4X + 3 |
the +3
factors are 1 and 3 |
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Factorising - What provides the factors in this equation?
2X^2 + 7X + 8 |
the +8
factors are 1,2 and 4 |
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What is the equation for solving quadratic Equations?
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X = -b ± √b^2 - 4ac
-------------------- 2a |
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what is the formula for finding a length in a non-right angled triangle using the sine rule?
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the Sine rule
a = b = c ------ ------ ------ sinA sinB sinC |
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what is the formula for finding an angle in a non-right angled triangle using the sine rule?
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the Sine rule
sinA = sinB = sinC ------ ------ ------ a b c |
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what is the formula for finding lengths in a non-right angled triangle using the cosine rule?
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a^2 = b^2 + c^2 - 2bc CosA
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what is the formula for finding angles in a non-right angled triangle using the cosine rule?
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CosA = b^2 + c^2 - a^2
---------------------- 2bc |
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What is the Sine rule for triangle area?
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Area = 1/2 ab SinC =
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Frequency Polygon
self allocated term |
line graph alternative
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Histogram
self allocated term |
bar graph using frequency density
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Frequency density =
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Frequency Density =
Frequency ÷ Class Width |
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Cumulative frequency diagram
self allocated term |
smooth line using cumulative frequency
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fx =
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fx = midpoint x frequency
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mean on grouped data =
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fx
--- f |
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Statistics - Range =
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the difference between the first and last pieces of data
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Statistics - Mean =
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sum of values - number of values
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Statistics - Median =
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Middle number when values are ordered numerically
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Statistics - Mode =
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Most Common value(s)
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Types of data - Qualitative data =
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refers to qualities I.E eye colour
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Types of data - Quantitive data =
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refers to quantities
can be: discreet = can only be limited values I.E shoe size continuous = can take any value I.E height |
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How is a stratified sample taken?
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value(s)
----------- total of all values x the number of sample needed |
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mutually exclusive =
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can't occur at the same time
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Exhaustive outcomes =
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when there are no possible other outcomes E.G rolling an odd or an even number on a dice
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Complementary events =
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where you can find the probability of something by taking the probability of it not happening and taking it away from 1
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Independent events =
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are when the outcome of 1 event does not affect the outcome of the next event
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