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

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elegant11
 one year ago
Best ResponseYou've already chosen the best response.0these are the answer choices 2pik pi/2 + 2k pi + 2pik 3pi/2+ 2pik

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

elegant11
 one year ago
Best ResponseYou've already chosen the best response.0i have no idea. i don't even know where to begin :(

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

elegant11
 one year 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
 one year ago
Best ResponseYou've already chosen the best response.1I'm gonna go now, will tell u after solving..

jkasdhk
 one year 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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