Determine exact values for trigonometry equation

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The discussion revolves around solving the equation x^2 - 2cosx = 0. Participants express uncertainty about finding an exact solution, suggesting that the problem may not have a straightforward answer. There is a suggestion to consult a teacher for clarification, as the phrasing of "Find the exact solution" seems misleading. Some participants propose using a graphing calculator or Newton's method as potential approaches. The consensus is that the problem may require further guidance from the instructor.
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Homework Statement


Find the exact solution for:
x^2 - 2cosx = 0


Homework Equations





The Attempt at a Solution


There aren't any constants to bring to the other side, so I'm not sure how to solve for x.
 
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Was this a problem from a book? because you can't find an exact solution to this problem.
 
Mentallic said:
Was this a problem from a book? because you can't find an exact solution to this problem.

Yes, it was. I'll have to ask my teacher about it tomorrow.
Maybe she meant for us to use a graphing calculator?
Thanks anyway. :]
 
Or maybe even using Newton's method. Whichever way your teacher expected you to solve it, I don't know why they would say "Find the exact solution for:"... Tell your teacher you can't find the exact solution and see what they come up with :wink:
 

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