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anonymous
 4 years ago
Find the values of x for which the equation cos x = –1 is true. Let k represent an integer.
anonymous
 4 years ago
Find the values of x for which the equation cos x = –1 is true. Let k represent an integer.

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anonymous
 4 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
 4 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
 4 years ago
Best ResponseYou've already chosen the best response.0i have no idea. i don't even know where to begin :(

jkasdhk
 4 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
 4 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
 4 years ago
Best ResponseYou've already chosen the best response.1I'm gonna go now, will tell u after solving..

jkasdhk
 4 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
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