document.write( "Question 814389: The problem is asking me to use the angle sum or difference identity to find the exact value of
\n" ); document.write( "Tangent 285° \n" ); document.write( "

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The problem is asking me to use the angle sum or difference identity to find the exact value of
\n" ); document.write( "Tangent 285°
\n" ); document.write( "***
\n" ); document.write( "tan(285˚)=tan(240+45)=tan(240)+tan(45)/(1-tan(240)tan(45))
\n" ); document.write( "=(√3+1)/(1-√3*1)=(1+√3)/(1-√3)
\n" ); document.write( "Check: (w/calculator)
\n" ); document.write( "tan(285˚)≈-3.732..
\n" ); document.write( "exact value=(1+√3)/(1-√3)≈-3.732.. \n" ); document.write( "

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