precalc test 10/20

pi meanings

3.14

180 degrees

1 radian is what

180/pi

how to do degrees to radians

180/pi

how to do radians to degrees

pi/180

how many feet in a mile

5280

how many radians in a revolution

2pi

pythag triples

3-4-5

6-8-10

5-12-13

7-24-25

unit circle equation

x²+y²=1

a positive angle rotates which way

counterclockwise (left)

a negative angle rotates which way

clockwise (right)

how to determine coterminal angles

add 2pi to the angle

to graph a sin function how do u do it

start at origin (wherever the midline lays), go to highest point, back to middle, down to lowest point, and then back up to middle

amplitude is what

half of height

from midline to tallest point or midline to lowest point

cos graph starts where

highest point

what does everything stand for in y=asin(b(x-h))+k

a = amplitude, take absolute value, the stretch or shrink

b = 2pi/b to find the period

x-h = move to right

x+h = move to left

both help figure out phase shift

k = up or down (add is up, subtract is down)

set notation

{XER | x =/ +- nm ngz}

x = first asymptote

n = between asymptotes

PVR

• principal value range (inverse)

• use if a function is not 1-1 To restrict domain

one-to-one function has to

• pass VLT

• pass HLT

• have inverses

how to find coterminal angles

add and subtract 2pi