document.write( "Question 1209635: Show that\r
\n" ); document.write( "\n" ); document.write( "(a) sin 2theta * cos theta + cos 2theta * sin theta = sin 4theta * cos theta - cos 4theta * sin theta
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Algebra.Com's Answer #849715 by mccravyedwin(407)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "\"sin%282theta%29%2Acos%28theta%29+%2B+cos%282theta%29%2Asin%28theta%29\"\"%22%22=%22%22\"\"sin%284theta%29%2Acos%28theta%29+-+cos%284theta%29%2Asin%28theta%29\"\r\n" );
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document.write( "Use the identities:\r\n" );
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document.write( "\"sin%28A+%2B-+B%29\"\"%22%22=%22%22\"\"sin%28A%29cos%28B%29+%2B-+cos%28A%29sin%28B%29\"\r\n" );
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document.write( "\"sin%282theta%2Btheta%29\"\"%22%22=%22%22\"\"sin%284theta-theta%29\"\r\n" );
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document.write( "\"sin%283theta%29\"\"%22%22=%22%22\"\"sin%283theta%29\"\r\n" );
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document.write( "Edwin
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