APPC 3.1-3.3 quiz

finding amplitude

distance between min and max times 1/2

finding period

horizontal distance between the maximums and minimums

find intervals of concave up/down and increase/decrease

(x±(period), y±(period)) for nez

when doing frq and figuring out x coordinates, remember to

divide the period by 4 to get the intervals in between

sin equals

y/r

cos equals

x/r

tan equals

y/x

quadrant - signs

1: (x,y); 2: (-x,y); 3: (-x,-y); 4: (x,-y)

arc length formula

1/r times 2(pie)r

radian formula

arc length / radius

coordinates regarding cos/sin

(r cos (angle), r sin (angle))

how to find coterminal angles

add/subtract by 2(pie) and go to common denominator (add- angle is negative) (subtract- angle is positive)