UNIT CIRCLE + CONVERSION Flashcards
In the 1st quadrant, the following angles are positive:
- sin
- cos
- tan
- csc
- sec
- cot
In the 2nd quadrant, the following angles are positive:
- sin
- csc
In the 3rd quadrant, the following angles are positive:
- tan
- cot
In the 4th quadrant, the following angles are positive:
- cos
- sec
Degrees -> Radians
(# of degrees / 360 degrees) x 2(pi)
Radians -> Degrees
(# of radians / 2(pi)) x 360 degrees
arc length
theta x radius
radius
arc length / theta
special angles
30, 45, 60
quadrantal angles
0, 90, 180, 270, 360
smallest positive value
alpha
angle whose terminal side lies on either the x-axis or y-axis
quadrantal
Coterminal angles who share the same ______ and _____ side
initial, terminal
Coterminal angles are found by __________ or __________ (_____ or _____) to an angle.
adding, subtracting, 360 deg, 2pi