Unit 1 Flashcards
Distance formula
d= √(x2-x1)²+(y2-y1)²
Midpoint formula
(x1+x2/2),(y1+y2/2)
Gradient formulas
m=y2-y1/x2-x1
m=tanø
When are points collinear
When they lie on the same straight line
Gradients of perpendicular lines
m x m_ = -1
How to find a median
Midpoint
Gradient
Equation
How to find an Altitude
Gradient
Perpendicular gradient
Equation
How to find a perpendicular bisector
Midpoint
Gradient
Perpendicular gradient
Equation
When are lines concurrent
If there is a point through which they all pass
What is this
f^-1(x)
Inverse
How to find the inverse of a function
Change notation from f(x) to y
Change subject to x
Change notation back to f^-1(x)
Change y in equation to x
How to draw the graph of an inverse
Reflect it over the line y=x
What is this
f(x)=a^x
Exponential function
What points do the graphs of an exponential function always pass through
(0,1) (1,a)
How to sketch the graph of an exponential function
Sub in x=0
Sub in x=1
What is this
f(x)=log a x
Logarithm
What points to the graph of a logarithmic function always pass through
(1,0) (a,1)
How to change degrees to radians and radians to degrees
x 3.14 x 180
180 3.14
Exact values table
30 45 60
sinx 1/2 1/√2 √3/√2
cosx √3/2 1/√2 1/2
tanx 1/√3 1 √3/1
f(x)+a
Shifts graph up y axis
f(x+a)
Shifts graph -a along x axis
-f(x)
Reflects graph in x axis
f(-x)
Reflects graph in y axis
kf(x)
Scales graph vertically
Stretches if k>1
Compresses if k<1