document.write( "Question 766727: use the appropriate sum or difference identity to write the given expression as a function of x alone.\r
\n" ); document.write( "\n" ); document.write( "cos( x - pi) \n" ); document.write( "

Algebra.Com's Answer #467187 by lwsshak3(11628) $\"\"$ $\"About$

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use the appropriate sum or difference identity to write the given expression as a function of x alone.
\n" ); document.write( "cos( x - pi)
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\n" ); document.write( "cos(x-π)=cosxcosπ+sinxsinπ=cosx(-1)+sinx*0=-cosx \n" ); document.write( "

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