Question

For what x-value(s) does cos(x) = -1?
A. -270°, -90°, 90°, and 270°
B. -270°, -90°, 0°, 90°, and 270°
C. -180° and 180°
D. -360°, 0° and 360°

Answer 1

@Jhannybean

Answer 2

http://www.geocities.ws/petrinamaher/UnitCircle.GIF Use this! :D

Answer 3

would that be c

Answer 4

Yessirree! :D

Answer 5

thanks that helps !!!

Answer 6

do you have a website for sin

Answer 7

Just google sine graphs :P