Need up to 30 seconds to load.

all right please listen up what I'd like

you to do is if you look over here guys

all they're asking us to do is find a

period in amplitude that's it so we just

need to remember what our definitions

were for the period and the amplitude so

the period all actually let's look at

Matthew first the amplitude all that is

is the absolute value of a all right now

if we don't know what a is we need to go

back and think the general formula of

the function which is in your book says

eight I'm sine of BX minus C plus D all

right where each one of these numbers

for these coefficients are all integers

all real numbers so a is going to be my

number that's in front of sine so I go

and take a look so my amp dude is going

to be the absolute value of 3 so

absolute value 3 is obviously going to

be 3 so therefore my amplitude

equals 3 all right yes

exactly so if it was negative three

after bad negatory still three yeah

that's a CW amplitude chose day right

pretty much except if it's negative

that's a guy now period is going to get

a little more difficult for this one is

costume Abner period is 2pi divided by b

so we look at Hartwell what does B well

B is going to be our number that we can

directly put in front of X well we look

in this problem in our numbers two so

it's going to be two PI over 2 of them

well those can cancel out so we're just

left with okay and we're going to talk

more about what the period in amplitude

are in second but the poor part we know

to find them is really really important

you guys to be only crap that's the

formula I told you