document.write( "Question 773663: Please help me answer this!!\r
\n" ); document.write( "\n" ); document.write( "Use the identity cos(α+β)= cosαcosβ-sinαsinβ to find the value of cos 7pi/12\r
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\n" ); document.write( "\n" ); document.write( " Please reply soon and Thaank you in advance!!
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Algebra.Com's Answer #471751 by ramkikk66(644) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "pi/4 = 45 deg. \r\n" );
document.write( "pi/3 = 60 deg.  and \r\n" );
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document.write( "So  =\r\n" );
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document.write( "Hope you got it :)\r\n" );
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