document.write( "Question 984931: Polar representation of z= cos a-isina
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Algebra.Com's Answer #605861 by ikleyn(53763)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "z = cos(a) -i*sin(a)  =  cos(-a) + i*sin(-a).\r
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\n" ); document.write( "\n" ); document.write( "The modulus is  1. \r
\n" ); document.write( "\n" ); document.write( "The argument  (the polar angle)  is  -a.\r
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