document.write( "Question 539489: how do i solve this equation without using a calculator?\r
\n" ); document.write( "\n" ); document.write( "(cos (12 degrees)(cos (4 degrees) + (sin (12 degrees)(sin (4 degrees)= cos 16 degrees\r
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Algebra.Com's Answer #353434 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
It's an identity, nothing to solve.
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