Question

Find the period and amplitude of the function.
y= -3cospix

Answer 1

Well, the period is always pi/the variable in front of x.
so pi/pi
Not sure about the amplitude, sorry.

Answer 2

@Cookieyumm 2pi/... for period, friend, not pi/...

Answer 3

Thanks guys! I found the amplitude, which is -3 in front of the cos also known as the a value = amplitude.

Answer 4

Oops sorry!

Answer 5

oh, no, amplitude = | -3| =3, amplitude doesn't have negative value

Answer 6

Ok, @Cookieyumm you continue?

Answer 7

I see. Thank you.

Answer 8

so, no need to do more? ok, got it.