document.write( "Question 766937: use an appropriate identity to find the exact value of the expression\r
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Algebra.Com's Answer #467324 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
Angle addition formula and your angles are \"pi%2F4+%2B+pi%2F6\".\r
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\n" ); document.write( "\n" ); document.write( "Identity is \"cos%28a%2Bb%29=cos%28a%29cos%28b%29-sin%28a%29sin%28b%29\"
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