Question

For what x-value(s) does cos(x) = -1?

A. -270°, -90°, 0°, 90°, and 270°

B. -180° and 180°

C. -360°, 0° and 360°

D. -270°, -90°, 90°, and 270°

Answer 1

@zzr0ck3r for my answer i got B but i'm not sure...

Answer 2

did you plug it in to the calculator

Answer 3

no...

Answer 4

how do i do that?

Answer 5

you are correct

Answer 6

ask @zzr0ck3r i do cos and stuff but i never do one like this sorry

Answer 7

dont be sorry:)

Answer 8

oh ok thanks! @zzr0ck3r and for For what x-value(s) does cos(x) = 1?

Answer 9

:D

Answer 10

what do you think?

Answer 11

-360, 0° and 360° ?

Answer 12

correct

Answer 13

nice

Answer 14

you on it:)

Answer 15

yes! i'm so glad i finally get it! thank you :)

Answer 16

npz