Question

which of the following demonstrates periodic behavior?
Tennis ball thrown up into the air
Movement of cd in cd player
Flight of football while tossed
Take off and landing of jet plane

Answer 1

@LastDayWork

Answer 2

I think its the movement of cd in cd player?

Answer 3

"..think.." o.O
Can you describe "periodic behavior" ?

Answer 4

its like the cycles for a sinusoidal function, like their specific descriptions

Answer 5

I think its B not sure though

Answer 6

B is correct :)

Here's something I found on "Encyclopedia Britannica"
"periodic motion, in physics, motion repeated in equal intervals of time."

Answer 7

cool thank you!

Answer 8

I have a couple of other questions, would it be better on this same post or different ones?

Answer 9

Your call..I am not much into medals.. ;)

Answer 10

haha ok on here then :)

Answer 11

y = csc x does not have zeros.
True or False?
True? :)

Answer 12

"...does not have zeros"
Can you describe the term "zero" ??

Answer 13

zeros would be where the graph touches x axis

Answer 14

and the graph of y=csc x does not touch the x axis at any moment

Answer 15

Hence, true :)

Answer 16

awesome :)

Answer 17

which of the following shows a change in amplitude (amplitude would be the A in the equation for sinusoid function -- y = Asin(B(x +/- c)) +/- D

y = tan2x
y = -2-cos(x-pi)
y = -2cos6x
y= 1+ sin x
Therefore, based on the general equation I believe the answer would be C?

Answer 18

Do you know how to differentiate an equation ?

Answer 19

?

Answer 20

I'll take that as a NO :P

"which of the following shows a change in amplitude (amplitude would be the A in the equation for sinusoid function -- y = Asin(B(x +/- c)) +/- D"
What do you mean by "change in amplitude" ??

Answer 21

like the amplitude has changed from the parent graph you know the original equation for tan or sin or cos etc.. like y = cos x ---> y = -2cos6x. The graph has now had a vertical stretch of 2 and been flipped across axis due to the negative sign

Answer 22

Change of 2 in amplitude that's kinda what I mean. Not really sure how to explain it otherwise.

Answer 23

the amplitude has changed into a different number or something like that not really sure how to explain it

Answer 24

Okay I got it. Lemme read the question again :)

Answer 25

Yep C is correct.

Answer 26

which function does the graph show? y = tan 2x y = 3cos4x y = sin(x+ pi) y = -2-cos(x-pi)