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
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2 answers

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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answered by Steve 
Find the real solutions of the equation. (Round your answers to three decimal places. Enter your answers as a commaseparated list.)
3.4x4 − 1.9x2 = 2.2 👍
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answered by jenny
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