document.write( "Question 167218: For the life of me, I cannot solve 4cos^2x - sinx -5 = 0. Any help would be appreciated. \n" ); document.write( "

Algebra.Com's Answer #123149 by Edwin McCravy(20056) $\"\"$ $\"About$

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For the life of me, I cannot solve 4cos^2x - sinx -5 = 0. Any help would be appreciated\r
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document.write( "Use the Pythagorean identity \r\n" );
document.write( "to replace  by \r\n" );
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document.write( "Multiply thru by \r\n" );
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document.write( "This is a quadratic in \r\n" );
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document.write( "But it can have no solution since the discriminant\r\n" );
document.write( "would be negative  \r\n" );
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document.write( "Edwin

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