document.write( "Question 786384: 20 sin2 x + 21 sin x + 4 = 0\r
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Algebra.Com's Answer #477876 by mananth(16946) $\"\"$ $\"About$

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$\"20+sin%5E2+%28x%29+%2B+21+sin+%28x%29+%2B+4+=+0\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"20+sin%5E2+%28x%29+%2B+16sin%28x%29%2B5+sin+%28x%29+%2B+4+=+0\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"4sin%28x%29%285sin%28x%29%2B4%29%2B1%285sin%28x%29%2B4%29=0\"$ \r
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\n" ); document.write( "\n" ); document.write( "(5sin(x)+4)((4sin(x)+1)=0\r
\n" ); document.write( "\n" ); document.write( "sin(x)=-4/5 OR sinx=-1/4\r
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\n" ); document.write( "\n" ); document.write( "Now apply (0,2pi)\r
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