document.write( "Question 1022980: Find the exact value of x without using a calculator: tan x=-1, 0<=x<=pi \n" ); document.write( "
Algebra.Com's Answer #638547 by stanbon(75887)\"\" \"About 
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Find the exact value of x without using a calculator: tan x=-1, 0<=x<=pi
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\n" ); document.write( "tan(x) = -1 when the angle is 135 degrees or (3/4)pi
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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