math formula (basic edition)

doesn't have recurring decimals

What are the three trigonometric rations?

opposite, hypotenuse, adjacent

What is 1?

the hypotenuse

What is 2?

the opposite

What is 3?

the adjacent

What is 4?

theta (θ)

How to spot the hypotenuse?

it is the longest horizontal line

How to spot the opposite?

it is opposite from the theta

How to spot the adjacent?

it is right next to the theta

How to tell when you need to use sin?

if the lines you using for the calculation are the opposite and the hypotenuse

How to tell when you need to use cos?

if the lines you are using for the calculation are the adjacent and the hypotenuse

How can you tell when you need to use tan?

if the lines you are using for the calculation are the opposite and the adjacent

Calculation for sin?

O/H

Calculation for cos?

A/H

Calculation for tan?

O/A

How to remember the calculation for sin, cos and tan?

SOCAHTOA

How do you find a missing side on a triangle

1. sin θ = O/H // cos θ = A/H // tan θ = O/A

2. rearrange

How to find a missing angle on a triangle?

1. sin θ = O/H // cos θ = A/H // tan θ = O/A

2. use sin/tan/cos^-1

How do you adapt this to an isosceles triangle?

split the triangle in half vertically to make 2 right angle triangles and proceed as usual

What are the averages?

mode, median, mean and range

What is the mean?

total of numbers/number of numbers

What is the mode?

the most commonly occurring number

What is the median?

middle value in an ordered list

What is the range?

largest-smallest

What is cumulative frequency?

a running total of the frequency column

what is the equation of a straight line

y = mx + c

How do you find the gradient?

change in y / change in x

What gradient do parallel lines have?

the same gradient

What gradient do perpendicular lines do?

meet and 90° and have different, but related gradient

How do the perpendicular gradients appear?

in pairs, b/a and -a/b