Yr 2 Pure Flashcards
1
Q
degrees to radians
A
a*π/180
2
Q
radians to degrees
A
a*180/π
3
Q
sinx = 1/2
A
x = 30 deg x = π/6 rad
4
Q
cosx = √3/2
A
x = 30 deg x = π/6 rad
5
Q
tanx = √3/3
A
x = 30 deg x = π/6 rad
6
Q
sinx = √2/2
A
x = 45 deg x = π/4 rad
7
Q
cosx = √2/2
A
x = 45 deg x = π/4 rad
8
Q
tanx = 1
A
x = 45 deg x = π/4 rad
9
Q
sinx = = √3/2
A
x = 60 deg x = π/3 rad
10
Q
cosx = 1/2
A
x = 60 deg x = π/3 rad
11
Q
tanx = √3
A
x = 60 deg x = π/3 rad
12
Q
arc length formula
A
degrees = ϴ/360 * 2πr radians = rϴ
13
Q
sector area formula
A
degrees = ϴ/360 * πr^2 radians = 1/2r^2ϴ
14
Q
small angle approximation sin and tan
A
ϴ = sinϴ = tanϴ
15
Q
small angle approximation cos
A
cosϴ = 1 - 1/2ϴ^2
