Formulas not given to you

Question 1

What is the formula for the area of a sector (in radians)?

Answer 1

1/2 x θ x r^2

Where r is the side length and theta is the angle

Question 2

What is the formula for the Arc Length of a sector (Radians)?

Answer 2

rθ

(Where r is the side length of the sector, and θ is the angle)

Question 3

What is the nth term of an arithmetic sequence

Answer 3

a(n-1)d

a is the first term, n = number of terms, d is the common difference

Question 4

What is the nth term of a geometric sequence

Answer 4

ar^(n-1)

Where a = first term, r = common ratio, n = number of terms

Question 5

For events A and B,

P(B|A) = ?

Answer 5

P(A U B)/P(A)

Question 6

What is the area of a trapezium?

Answer 6

1/2(a+b)h

Question 7

What is the formula for compound interest?

Answer 7

P(1+R/100)^n

P = start amount, r = interest rate, n = number of times

Question 8

Formula for Newtown’s second law

Answer 8

F = MA

Force = Mass x Acceleration