Pure 2: Trigonometry Flashcards
1
Q
What is 1 π radians in degrees?
A
- 180°
2
Q
What is formula for arc length?
A
s = r x θ (in radians)
3
Q
What is the formula for area of a sector?
A
- A = 1/2 r2θ
4
Q
What are the small angle approximations for sinθ, cosθ and tanθ?
A
- sinθ ≈ θ
- cosθ ≈ 1 - (θ2/2)
- tanθ ≈ θ
5
Q
What are some common angles are sin, cos and tan?
A
6
Q
Draw the graph of sin x and describe its features
A
7
Q
Draw the graph of cosx and describe is features
A
8
Q
Draw the graph of tanx and describe its features
A
