3.9-3.11

csc VAs

starting point + half period

sec VAs

(starting point+quarter period) + half period

cot VAs

starting point + period

points for arcsin (neg - pos x coord)

(-1,-pi/2) (0,0) (1,pi/2)

points for arccos (neg - pos x coord)

(-1,pi) (0,pi/2) (1,0)

points for arctan (neg - pos x coord)

(-1,-pi/4) (0,0) (1,pi/4)

HA for arctan

-pi/2 and pi/2

amplitude

(max-min)/2

midline

(max+min)/2

period

the reciprocal of frequency; change in x values required for the function to complete a cycle

frequency

the reciprocal of period; the frequency is about 0.12 cycles per radian

principle value sin

1st and 4th

principle value cos

1st and 2nd

principle value tan

1st and 4th

sin double angle

2sinacosa

cos double angle

cos^2a - sin^2a

or 2cos^2a - 1

or 1-2sin^2a