Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
Find the values of x for which the equation cos x = –1 is true. Let k represent an integer.
 one year ago
 one year ago
Find the values of x for which the equation cos x = –1 is true. Let k represent an integer.
 one year ago
 one year ago

This Question is Closed

elegant11Best ResponseYou've already chosen the best response.0
these are the answer choices 2pik pi/2 + 2k pi + 2pik 3pi/2+ 2pik
 one year ago

jkasdhkBest ResponseYou've already chosen the best response.1
isn't there k in the equation? which we're supposing as an integer?
 one year ago

elegant11Best ResponseYou've already chosen the best response.0
i have no idea. i don't even know where to begin :(
 one year ago

jkasdhkBest ResponseYou've already chosen the best response.1
hold on.. and check the question again if it is the same u've written?
 one year ago

elegant11Best ResponseYou've already chosen the best response.0
Find the values of x for which the equation cos x = –1 is true. Let k represent an integer.
 one year ago

jkasdhkBest ResponseYou've already chosen the best response.1
I'm gonna go now, will tell u after solving..
 one year ago

jkasdhkBest ResponseYou've already chosen the best response.1
Well when is cosx = 1 the first time in the circle? At π (because x=180 degrees)... right? So now when does it occur again, well it doesnt happen again until we go around in a full circle. So another 2π and this will happen indefinitely for any integer k. So the answer is: π + 2πk
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.