Trigonometry Flashcards
1
Q
What is a unit circle?
A
The circle is centred at the origin. The coordinates are (cos@, sin@)
2
Q
How do you find the length of an arc?
A
r@
3
Q
How do you find the area of a sector?
A
1/2r@^2
4
Q
When working with sectors and arcs, always use
A
RADIANS
5
Q
Area of any triangle
A
1/2ab sin C
