document.write( "Question 898230: Hi,\r
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\n" ); document.write( " cos(tan ^-1)(-1))\r
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Algebra.Com's Answer #544781 by lwsshak3(11628)\"\" \"About 
You can put this solution on YOUR website!
evaluate\r
\n" ); document.write( "\n" ); document.write( "cos(tan ^-1)(-1))=cos(315˚)=√2/2\r
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\n" ); document.write( "sec^-1(2)=120˚
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