document.write( "Question 1012726: which sum or difference identity would you use to verify that sin(180 + theta) = -sin(theta)? \n" ); document.write( "

Algebra.Com's Answer #628761 by fractalier(6550) $\"\"$ $\"About$

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sin(a + b) = sin a * cos b + sin b * cos a \n" ); document.write( "

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