document.write( "Question 770683: solve the equation on the interval [0,2π]
\n" ); document.write( "suppose f(x)=2cosθ+1. solve f(x)=0
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Algebra.Com's Answer #469686 by tommyt3rd(5050)\"\" \"About 
You can put this solution on YOUR website!
\"cos%28theta%29=+-1%2F2\"\r
\n" ); document.write( "\n" ); document.write( "at \r
\n" ); document.write( "\n" ); document.write( "\"pi%2F2\" and \"3pi%2F2\"
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