sin,cos,tan,cot,sec,csc

3rd quadrant

-1,0

4th quadrant

0,-1

2nd quadrant

0,1

1st quadrant

1,0

60 degrees

1/2, sqrt3/2

45 degrees

1/sqrt2, 1/sqrt2

co-functions

2 angles that add up to 90

1st quadrant

all functions positve

cos, sec

positive in fourth quadrant

sin, csc

positive in second quadrant

tan, cot

positive in third quadrant

sec

r/x

csc

r/y

30 degrees

sqrt3/2, and 1/2

cos

x/r

cot

x/y

sin

y/r

tan

y/x