document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1045447>Question 1045447</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The answer must be given In radians. Thanks!<BR>\n" );
document.write( "2cos^2x + 3cosx -2 = 0 </SPAN>\n" );
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document.write( "2cos^2x + 3cosx -2 = 0 <BR>\n" );
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document.write( "Factor::<BR>\n" );
document.write( "(2cos(x)-1)(cos(x)+2) = 0<BR>\n" );
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document.write( "cos(x) = 1/2 or cos(x) = -2 (extraneous)<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "x = arccos(1/2) = pi/3 or x = (11/3)pi<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "----------------- </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );