arc length
s=r(theta)
area of a sector
a=(1/2)r^2(theta)
linear speed
v=s/t (distance over time)
angular speed
w=theta (IN RADIANS)/time
30 60 90
1, root 3, 2
45 45 90
1, 1, root 2
trig function with radians
convert to degree first
ASTC
which one is positive
even odd properties
x(-theta)=-xtheta for all excpet cos and sec= +
weird thing
sin^2theta+cos^2theta=1
amp and period for sin and cos graphs
- period=2pi/b
sin vs cos visually
tan
up to right
cot
up to left
-tan
up to left