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lucky_girl_280
 3 years ago
Find x in [−6π, 0] such that cos(x/6) = 1/2
lucky_girl_280
 3 years ago
Find x in [−6π, 0] such that cos(x/6) = 1/2

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Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0\[cos\left(\frac{x}{6}\right) =\frac{1}{2}\] well have you tried it yet

lucky_girl_280
 3 years ago
Best ResponseYou've already chosen the best response.0yes. it doesnt work

lucky_girl_280
 3 years ago
Best ResponseYou've already chosen the best response.0i tried doing cos^1(1/2) and multiplying by 6

Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0do you know general solutions?

Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0\[\cos\left(\frac{x}{6}\right) =\frac{1}{2} => \frac{x}{6} =\cos^{1}\left(\frac{1}{2}\right) => \frac{x}{6} =\frac{\pi}{3} \]

Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0are you able to do it now

lucky_girl_280
 3 years ago
Best ResponseYou've already chosen the best response.0no that didnt work :( but i feel like thats almost right. How did you know it equaled pi/3?

Mimi_x3
 3 years ago
Best ResponseYou've already chosen the best response.0\[\frac{x}{6} =\frac{\pi}{3} => 3x = 6\pi => x= 2\pi \] it works

lucky_girl_280
 3 years ago
Best ResponseYou've already chosen the best response.0i didnt accept it lol
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