document.write( "Question 1102804: An equation is given. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to three decimal places where appropriate. If there is no solution, enter NO SOLUTION.)
\n" ); document.write( "2 cos(2θ) + 1 = 0\r
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Algebra.Com's Answer #717548 by ikleyn(52839) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( " + 1 = 0  ====>\r\n" );
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document.write( " =   ====>\r\n" );
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document.write( "  may have one of the two values:   =   or   = .\r\n" );
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document.write( "Case 1.  If   = ,  then the solutions for  in the interval  [0,)  are  these TWO values:\r\n" );
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document.write( "          =    and/or    =  = .\r\n" );
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document.write( "Case 2.  If   = ,  then the solutions for  in the interval  [0,)  are  these TWO values:\r\n" );
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document.write( "          =    and/or    =  = .\r\n" );
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document.write( "Answer.  The given equation has 4 (four, FOUR) solutions in the interval  [0,):\r\n" );
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document.write( "                ,  ,  ,  and  .\r\n" );
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\n" ); document.write( "\n" ); document.write( "The plot below visually confirms existing of 4 solutions:\r
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\n" ); document.write( "\n" ); document.write( "Plot y = $\"2%2Acos%282%2Atheta%29+%2B+1\"$ \r
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\n" ); document.write( "\n" ); document.write( "        SOLVED.\r
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\n" ); document.write( "N O T E. All the part of the condition IN PARENTHESES makes no sense and IS NOT RELEVANT to the problem at all.\r
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\n" ); document.write( "\n" ); document.write( "        When I see such a NONSENSE in the condition, I become sad,
\n" ); document.write( "        because I clearly see that the person who prepared this post does not understand WHAT HE IS WRITING.\r
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