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anonymous
 one year ago
Is this correct? Solve the equation on the interval of \( 0\geq \theta < 2\pi \)
\( 2cos \theta + 3 = 2 \)
\( 2 cos \theta = 23 \)
\( 2 cos \theta = 1 \)
\( \frac{2 cos \theta}{2} = \frac{1}{2} \)
\( cos \theta = \frac{1}{2} \)
This was on my midterm and I made an A on it but this one I got wrong but this looks correct? What did I do wrong?
anonymous
 one year ago
Is this correct? Solve the equation on the interval of \( 0\geq \theta < 2\pi \) \( 2cos \theta + 3 = 2 \) \( 2 cos \theta = 23 \) \( 2 cos \theta = 1 \) \( \frac{2 cos \theta}{2} = \frac{1}{2} \) \( cos \theta = \frac{1}{2} \) This was on my midterm and I made an A on it but this one I got wrong but this looks correct? What did I do wrong?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Solve the equation on the interval of \( 0\geq \theta < 2\pi \) \[ \huge 2\cos \theta + 3 = 2 \] \[ \huge 2 \cos \theta = 23 \] \[\huge 2 \cos \theta = 1 \] \[ \huge \frac{2 \cos \theta}{2} = \frac{1}{2} \] \[\huge \cos \theta = \frac{1}{2} \]

Curry
 one year ago
Best ResponseYou've already chosen the best response.0wait how many answers did you provide? there are two answers.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0One sec it should be \(\huge 0\leq \theta < 2\pi \)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but if we work out the equation, like I did, it comes to what I have

TheSmartOne
 one year ago
Best ResponseYou've already chosen the best response.2You need to solve for \(\sf\theta\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ok so he wanted the angle

TheSmartOne
 one year ago
Best ResponseYou've already chosen the best response.2Yes, and you should get 2 answers for the angle

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes I get two. I was thinking he just wanted us to do it like that because some of our homework does it like I just did it.

TheSmartOne
 one year ago
Best ResponseYou've already chosen the best response.2What 2 angles did you get? :)

DanJS
 one year ago
Best ResponseYou've already chosen the best response.0cos(a) = x on the unit circle with radius 1... picture that thing

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I got 120 and 240 degrees. or 2pi/3 and 4pi/3

TheSmartOne
 one year ago
Best ResponseYou've already chosen the best response.2dw:1435870657418:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yep that is it :) Just a silly mistake on my part :( oh well lol

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Got the hardest one right because I put the angle lol

TheSmartOne
 one year ago
Best ResponseYou've already chosen the best response.2If they didn't have the restrictions on the value of \(\sf\theta\) then the answer would be: \(\sf\Large \theta=\frac{2\pi}{3}\pm2\pi n\) \(\sf\Large \theta=\frac{4\pi}{3}\pm2\pi n\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Funny, I made the same mistake on two but for some reason, on the hardest one I put the angle for that one but not the other two.... . DUFF what was I thinking lol

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Anyways... I still have an A in the class and I made an A on the midterm so I am happy :)
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