Flashcards in C1 Deck (16):

1

## perpendicular or normal

### do negative recipricol of gradient

2

## tangent

### keep gradient the same

3

## find the gradeitn of a line passing between 2 points

### y1-y2/x1-x2

4

## find the point of intersection

### solve 2 graphs as simultaneous equations to find coordinates

5

##
2 real distinct routes

2 points of intersection

kine intersects the circle

### b^2 - 4ac > 0

6

##
one repeated / real root

1 point of intersection

kine is a tangent to the circle

### b^2 - 4ac = 0

7

##
no real roots

no points of intersection

line fails to meet the circle

### b^2 - 4ac < 0

8

## vertex of (x-p)^2+q and line of symmetry

###
(p,q)

x=p

9

## equation of a circle with centre (a,b)

### (x-a)^2 + (y-b)^2 = r^2

10

## if value of dy/dx is positive at x=a

### then y is increasing at a

11

## if the value of dy/dx at x=a is negative

### then y is decreasing at x=a

12

## stationary when

### dy/dx = 0

13

## minimum if

### d^2y/dx^2 > 0

14

## Volume of a cylinder

### V = pie r^2 h

15

## Curved surface area of a cylinder

### 2 pie r h

16