document.write( "Question 1005851: hi there
\n" ); document.write( "i have a question about complex number \r
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\n" ); document.write( "F(x)= |sin(x)| + i cos|y| \r
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\n" ); document.write( "Apameh \n" ); document.write( "
Algebra.Com's Answer #621999 by AnlytcPhil(1807)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "That is a complex function of two variables x and y, so it\r\n" );
document.write( "should be F(x,y) not F(x).\r\n" );
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document.write( "|sin(x)| is not differentiable at np\r\n" );
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document.write( "However since cos(-y) = cos(y), it is differentiable everywhere.\r\n" );
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document.write( "So F(x,y) = |sin(x)| + i*cos|y| is differentiable everywehere\r\n" );
document.write( "except where x = np, where n is an integer.\r\n" );
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document.write( "Edwin
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