document.write( "Question 436367: Find the exact value of y=arccos(tan7pi/4)? \n" ); document.write( "
Algebra.Com's Answer #301905 by stanbon(75887)\"\" \"About 
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Find the exact value of y=arccos(tan7pi/4)?
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\n" ); document.write( "1st: tan(7pi/4) = -1
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\n" ); document.write( "2nd: arccos(-1) = 3.1416..
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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