C2 Flashcards
0
Q
Convert pi/20 radians to degrees?
A
9degrees
1
Q
How do you convert X radians to degrees?
A
180X / pi
2
Q
How do you convert Y degrees to radians?
A
Ypi / 180
3
Q
What does one degree equal in radians?
A
Pi / 180 rad
4
Q
How do you find the length of an arc using radians?
A
r x theta(radians)
5
Q
How do you find the sum of a series to infinity?
A
a / (1-r)
a = first term r = multiplier
6
Q
How do you tell if a series has a sum to infinity?
A
If the multiplier absolute value is less than 1 then it has a sum to infinity
7
Q
What is the equation for a sum of a geometric series?
A
Sn= a(1-r^n) / (1-r)
Or = a(r^n-1) / (r-1)
8
Q
For a geometric sequence, what is the formula for the nth term?
A
ar^n-1
9
Q
Area of a segment of a circle?
A
A = 0.5r^2(θ-sinθ)
10
Q
Area of a sector = ?
A
A = 0.5r^2θ
11
Q
Length of arc of a circle = ?
A
l = rθ
