document.write( "Question 1121811: Using trig identities simplify \"cos%28-x%29-sin%28-x%29\" \n" ); document.write( "
Algebra.Com's Answer #737801 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
These would be in your interest to know or be able to recognize:\r
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\n" ); document.write( "\n" ); document.write( "\"cos%28-x%29=cos%28x%29\"
\n" ); document.write( "and
\n" ); document.write( "\"sin%28-x%29=-sin%28x%29\"
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