Radians Flashcards
1
Q
How do you convert from degrees to radians?
A
x π/180
2
Q
How do you convert from radians to degrees?
A
x 180/π
3
Q
Equation for arc length
A
Arc length = rθ
4
Q
Equation for sector area
A
Sector area = 1/2r²θ
5
Q
Derive the equation for segment area
A
Segment area = sector area - area of triangle
= 1/2r²θ - 1/2absinC
= 1/2r²θ - 1/2r²sinθ
= 1/2r²(θ - sinθ)
6
Q
State the small angle approximations for sin cos and tan
A
Sinθ = θ
Tanθ = θ
Cosθ = 1 - θ²/2
