document.write( "Question 827944: Factor the expression and use the fundamental identities to simplify. Use a graphing utility to verify your result:
\n" ); document.write( "1-2cos^2x+cos^4x \n" ); document.write( "
Algebra.Com's Answer #498962 by lwsshak3(11628)\"\" \"About 
You can put this solution on YOUR website!
1-2cos^2x+cos^4x
\n" ); document.write( "\"cos%5E4%28x%29-2cos%5E2%28x%29%2B1=0\"
\n" ); document.write( "\"%28cos%5E2%28x%29-1%29%28cos%5E2%28x%29-1%29=0\"
\n" ); document.write( "\"%28cos%28x%29%2B1%29%28cos%28x%29-1%29%28cos%28x%29%2B1%29%28cos%28x%29-1%29=0\"
\n" ); document.write( "..
\n" ); document.write( "cos(x)+1=0
\n" ); document.write( "cos(x)=-1(mult.2)
\n" ); document.write( "x=π/2,3π/2
\n" ); document.write( "or
\n" ); document.write( "cos(x)-1=0
\n" ); document.write( "cos(x)=1(mult.2)
\n" ); document.write( "x=0,π
\n" ); document.write( "..
\n" ); document.write( "see graph below:
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