12cos^2x-11=0
Need to find the interval solution set

Question

12cos^2x-11=0
Need to find the interval solution set

mertsj · Answer

I don't know what you mean by "interval solution set"

anonymous · Answer

i need the solution set

mertsj · Answer

All solutions or between 0 and 2 pi?

anonymous · Answer

it was for my bf test. He doesn't know how to do the ones like this

mertsj · Answer

Well, the first step would be to get the problem stated correctly so we know what we are supposed to find.  So ask your bf to see the original problem and then post it EXACTLY as stated.

anonymous · Answer

will do for the next one. Keep an eye out there will most likely be more

mertsj · Answer

If you want to solve this one add 11 to both sides, then divide both sides by 12 then take the square root of both sides remembering that  all numbers have 2 square roots...the positive one and the negative 1.  That will be the cos of the angle.  So take each value and hit your inverse cosine button.