document.write( "Question 1105168: find the exact value
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Algebra.Com's Answer #719914 by ikleyn(52788) $\"\"$ $\"About$

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document.write( "  cos(n/6)cos(n/12)-sinx(n/6)sin(n/12) = apply the addition formula for cosine =\r\n" );
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document.write( "=  =  =  = . \r\n" );
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document.write( "Next,  I assume that \"n\" is actually \"pi\" =    (n is a way how the author of the post writes  )  and then  \r\n" );
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document.write( " =  = .\r\n" );
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