document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=770504>Question 770504</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How to find related angles of theta according to trigonometric ratios?<BR>\n" );
document.write( "Eg: sin (0 - theta) ? </SPAN>\n" );
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document.write( "Eg: sin (0 - theta) ?<BR>\n" );
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document.write( "Using reference angle:: sin(theta) = y/r<BR>\n" );
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document.write( "-theta has the same r value and the negative of the y value<BR>\n" );
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document.write( "So, sin(-theta) = -y/r = -[sin(theta]<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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