Pure Part 1 (A Levels)

Question 1

Arc length

Answer 1

l = r(theta)

Question 2

Area of a sector

Answer 2

A = 1/2 (theta)r^2

Question 3

Area of segment

Answer 3

1/2 r^2 ((theta)-sin(theta))

Question 4

Two a level trig identities

Answer 4

Tan^2 + 1 = sec^2

1+cot^2 = cosec^2