document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=867731>Question 867731</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the exact value of cos225° using 2 different formulas.\r<BR>\n" );
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document.write( "Please note: I tried using both the double and half angle formulas but I can't seem to get the answer. Your help would be greatly appreciated. With detailed steps so I can learn from it too. Thanks! </SPAN>\n" );
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document.write( "Find the exact value of cos225° using 2 different formulas.<BR>\n" );
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document.write( "Use cos(225) = -cos(45)<BR>\n" );
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document.write( "Use cos(225) = cos(180+45)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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