document.write( "Question 984124: Cos4x-cos4y=8(cosx-cosy)(cosx+cosy)(cosx-siny)(cosx+cosy) \n" ); document.write( "
Algebra.Com's Answer #605184 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Thx for letting us know. \n" ); document.write( " \n" ); document.write( " |