A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 3 years ago
Find the values of x for which the equation cos x = –1 is true. Let k represent an integer.
anonymous
 3 years ago
Find the values of x for which the equation cos x = –1 is true. Let k represent an integer.

This Question is Closed

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0these are the answer choices 2pik pi/2 + 2k pi + 2pik 3pi/2+ 2pik

jkasdhk
 3 years ago
Best ResponseYou've already chosen the best response.1isn't there k in the equation? which we're supposing as an integer?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0i have no idea. i don't even know where to begin :(

jkasdhk
 3 years ago
Best ResponseYou've already chosen the best response.1hold on.. and check the question again if it is the same u've written?

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

jkasdhk
 3 years ago
Best ResponseYou've already chosen the best response.1I'm gonna go now, will tell u after solving..

jkasdhk
 3 years ago
Best ResponseYou've already chosen the best response.1Well 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
Ask your own question
Sign UpFind more explanations on OpenStudy
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.