Question

which of the following functions illustrates a change in amplitude?

A.y=1 + sinx
B.y=-2-cos(x-pi)
C.y=tan2x
D.y=-2cos6x

Answer 1

what's the amplitude of each?

Answer 2

A is 1
B is -2
C is 2
D.is 6??

I don't know how to find the amplitude :/ @pgpilot326

Answer 3

y=Acos(t) +k

A is the amplitude.

cos has a range of -1 to 1. multiplying it by a constant makes it range over a larger or smaller values (depending if |A| > 1 or 0 < |A| < 1, resp.)

Answer 4

in A, the multiplier on the sin part is 1. Same for b and c, at least the absolute value of the multiplier.

for D what is the multiplier of cos?

Answer 5

-2 right? sorry I suck at trig lol

Answer 6

keep telling yourslef that and you will.

Answer 7

2 is the multiplier of cos for D right? :D

Answer 8

2 is the amplitude dude

Answer 9

It has to be D then since the amplitude of B is 1

Answer 10

d dude

Answer 11

That's what I said the answer is D