document.write( "Question 873030: Use an Addition or Subtraction Formula to find the exact value of the expression.
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document.write( "cos 195° \n" );
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Algebra.Com's Answer #526636 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Use an Addition or Subtraction Formula to find the exact value of the expression. \n" ); document.write( "cos 195° \n" ); document.write( "---------------- \n" ); document.write( "cos(195) = -cos(15) = -cos(30/2) \n" ); document.write( "Use the half-angle formula to solve. \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "---------------------- \n" ); document.write( " |