sin(theta)
opposite/hypotenuse
0° = 0
30° = ½
45° = 1/root2
60° = root3/2
90° = 1
cos(theta)
adjacent/hypotenuse
0° = 1
30° = root3/2
45° = 1/root2
60° = ½
90° = 0
tan(theta)
opposite/adjacent
0° = 0
30° = 1/root3
45° = 1
60° = root3
90° = undefined
BIDMAS
Brackets, Indices, Division, Multiplication, Addition, Subtraction
prime factors
The factors of a number that are prime numbers e.g. 2, 3, 5, 7, 11
algebra
numbers replaced by including variables (letters e.g. a, b, c, x)