document.write( "Question 1138524: Write the expression as the sine or cosine of an angle.
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document.write( "cos 5x cos 7x-sin 5x sin 7x \n" );
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Algebra.Com's Answer #756316 by MathLover1(20850)![]() ![]() You can put this solution on YOUR website! \r \n" ); document.write( "\n" ); document.write( " |