Formulae To Know Flashcards
1
Q
What is the question for the gradient?
A
y2-y1 / x2-x1
2
Q
What is another equation involving gradient?
A
y-y1= m(x-x1)
3
Q
What is the equation for binomial expansion?
A
n!/ r!(n-r)!
4
Q
What is the surface area of a sphere ?
A
4 pi r^2
5
Q
What is the volume of a sphere?
A
4/3 pi r^3
6
Q
What is the volume of a cone?
A
1/3 pi r^2 h
7
Q
What is the curved s.a of a cone?
A
pi r l
8
Q
What is the s.a of a closed cone?
A
pi r l (curved s.a) + pi r^2
9
Q
What is the s.a of a cylinder?
A
2pi r^2 + 2pi r h
10
Q
What is the volume of a cylinder?
A
pi r^2 h
11
Q
What is the arc length of a sector in radians?
A
radius x angle in radians
12
Q
What is the area of a sector in degrees?
A
x/360 * pi r^2
13
Q
What is the area of a sector in radians?
A
1/2 r^2 theta
