document.write( "Question 1006779: Tan^2(157.5) in degrees \n" ); document.write( "

Algebra.Com's Answer #622845 by Edwin McCravy(20056) $\"\"$ $\"About$

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document.write( "There are at least 6 well-known formulas for the tangent of \r\n" );
document.write( "half an angle.  Since 315° is a special angle, (a QIV angle\r\n" );
document.write( "with a reference angle of 45°), we can use any of these:\r\n" );
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document.write( "The last one is the simplest as it has no denominator. The others\r\n" );
document.write( "will require more complicated simplification, but will all end\r\n" );
document.write( "up with the same expression:\r\n" );
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document.write( "Edwin

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