Posted by stellar on Saturday, October 22, 2011 at 12:37am.
Find all solutions of the given equation. (Enter your answers as a commaseparated list. Let k be any integer. Round terms to two decimal places where appropriate.)
2 cos θ − 1 = 0

precal  Steve, Saturday, October 22, 2011 at 11:35am
solve for cosθ the way you would for any other variable.
2cosθ = 1
cos θ = 1/2
ta da. Of course, now you have to now how to find θ, but that's no problem, right?
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